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Portrait of Dr Christopher Gabbutt Dr Christopher Gabbutt

c.gabbutt@hud.ac.uk | 01484 471733



Biography

I am a Senior Research Fellow in the Department of Chemical and Biological Sciences. Prior to joining Huddersfield in August 2012 I have, over the last 21 years taught and researched in organic chemistry and held numerous administrative roles at the Universities of Central Lancashire (1991-1998), Hull (1998-2001) and Leeds (2001-2012). My teaching experience ranges widely across the subject and encompasses both fundamental and applied aspects of organic chemistry. I have as a result of my PhD (1987, CNAA) a long-standing research interest in heterocyclic chemistry, in particular the chemistry of benzopyrans and fused-ring derivatives. My research has developed several new methods to synthesise or to functionalise benzopyran-containing ring systems. Work on a wide variety of other heterocycles has also been undertaken. Concomitantly, research on photochromic heterocyclic compounds, in collaboration with industry, has been actively pursued since 1986 and has also produced many ‘firsts’. These include the discovery of the most intense colouring photochromic compounds – i.e. the amino-substituted spirooxazines, the controlled thermal fading of spirooxazines, the discovery of hyperchromic naphthopyrans and, more recently, the first dichroic naphthopyrans.

Work on photochromic compounds has resulted in 16 patents. Molecules developed over the years have now been commercialised world-wide.

Other materials chemistry-based projects, funded, by industry are currently underway.

Research & Scholarship

Aspects of benzopyran chemistry which have been extensively explored include: (i) Rearrangements of acylbenzopyranone derivatives initiated by acid or by addition of organolithium or organocuprate reagents. (ii) Ring and lateral directed lithiation and reductive lithiations of chromones, xanthones and xanthendiones. (iv) The synthesis and cycloadditions of benzopyrans possessing iso-condensed furan, thiophene and pyrrole rings.

Current interests centre upon:

Heterocyclic Materials Chemistry

Photochromism of aryl-linked naphthopyrans; investigation of substituent and electron transmission effects in naphthopyrans. Synthesis of optical molecular switches based on di(heteroaryl)ethene motifs. Design and synthesis of multiply switchable photochromic systems. Atropisomerism in photochromic compounds. Synthesis of novel p-deficient heterocyclic electron acceptors. Synthesis and properties of electrochromic compounds.

Synthetic Heterocyclic Chemistry

Synthesis of fused ring derivatives of 2H-pyran especially chromones, thiochromones and tetrahydroxanthendiones. Cycloaddition chemistry of furobenzopyrans. Synthesis of hetero-fused benzo[b]thiophenes and dibenzothiophenes.

New routes to and applications of transition metal-mediated transformations (Pd, Ir and Rh) for the synthesis of novel functional organic materials. Synthesis of fused-ring siloles and azaindolizines.

For further details, please see my Research Page

Publications and Other Research Outputs

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', 'creators_id' => 'c.gabbutt@hud.ac.uk', 'contributors_name_lineage' => undef, 'userid' => '3483', 'patent_applicant' => undef, 'monograph_type' => undef, 'datestamp_minute' => '4', 'lyricists_name_family' => undef, 'sword_slug' => undef, 'id_number' => 'doi:10.1016/j.tet.2005.09.143', 'volume' => '62', 'gscholar_datestamp_month' => undef, 'conductors_id' => undef, 'suggestions' => undef, 'referencetext' => undef, 'date_year' => '2006', 'status_changed_hour' => '12', 'gscholar_cluster' => undef, 'producers_name_family' => undef }, '15000' => { 'funders' => undef, 'conductors_name_family' => undef, 'num_pieces' => undef, 'department' => undef, 'contributors_id' => undef, 'gscholar_datestamp_second' => undef, 'keywords' => undef, 'lyricists_name_lineage' => undef, 'lyricists_id' => undef, 'edit_lock_since' => '1350553769', 'creatorlist' => { '1' => { 'creators_name_lineage' => '', 'creators_name_family' => 'Hepworth', 'eprintid' => '15000', 'creators_name_honourific' => '', 'pos' => '1', 'creators_name_given' => 'John D.', 'creators_id' => undef }, '3' => { 'creators_name_lineage' => '', 'creators_name_family' => 'Thomas', 'eprintid' => '15000', 'creators_name_honourific' => '', 'pos' => '3', 'creators_name_given' => 'Jean-Luc', 'creators_id' => undef }, '0' => { 'creators_name_lineage' => '', 'creators_name_family' => 'Gabbutt', 'eprintid' => '15000', 'creators_name_honourific' => '', 'pos' => '0', 'creators_name_given' => 'Christopher D.', 'creators_id' => 'c.gabbutt@hud.ac.uk' }, '2' => { 'creators_name_lineage' => '', 'creators_name_family' => 'Heron', 'eprintid' => '15000', 'creators_name_honourific' => '', 'pos' => '2', 'creators_name_given' => 'B. 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', 'creators_id' => 'c.gabbutt@hud.ac.uk', 'contributors_name_lineage' => undef, 'userid' => '3483', 'patent_applicant' => undef, 'monograph_type' => undef, 'datestamp_minute' => '0', 'lyricists_name_family' => undef, 'sword_slug' => undef, 'id_number' => 'doi:10.1039/A900730J', 'volume' => undef, 'gscholar_datestamp_month' => undef, 'conductors_id' => undef, 'suggestions' => undef, 'referencetext' => undef, 'date_year' => '1999', 'status_changed_hour' => '13', 'gscholar_cluster' => undef, 'producers_name_family' => undef }, '15081' => { 'funders' => undef, 'conductors_name_family' => undef, 'num_pieces' => undef, 'department' => undef, 'contributors_id' => undef, 'gscholar_datestamp_second' => undef, 'keywords' => undef, 'lyricists_name_lineage' => undef, 'lyricists_id' => undef, 'edit_lock_since' => '1350549946', 'creatorlist' => { '1' => { 'creators_name_lineage' => '', 'creators_name_family' => 'Heron', 'eprintid' => '15081', 'creators_name_honourific' => '', 'pos' => '1', 'creators_name_given' => 'B. 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The naphthopyrans 15, derived from 12, were readily diazoacylated with ethyl diazomalonyl chloride. 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Direct oxidation affords 3,3-dichlorochroman-4-ones, whilst conversion to the sulfenamides prior to oxidation provides a facile route to 3-chlorochroman-4-ones. 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alkyl, C¿3?-C¿20? cycloalkyl, C¿4?-C¿20? bicycloalkyl, C¿5?-C¿20? polycycloalkyl, linear or branched C¿1?-C¿20? haloalkyl, linear or branched C¿1?-C¿20? perhaloalkyl, linear or branched C¿2?-C¿20? alkenyl, linear or branched C¿4?-C¿20? polyalkenyl, linear or branched C¿2?-C¿20? alkynyl, linear or branched C¿4?-C¿20? polyalkynyl, linear or branched C¿1?-C¿20? hydroxyalkyl, linear or branched C¿1?-C¿20? alkylcarbonyl, linear or branched C¿1?-C¿20? polyhydroxyalkyl, linear or branched C¿1?-C¿20? alkoxy, linear of branched C¿1?-C¿20? alkylthio, linear or branched C¿1?-C¿20?(C¿1?-C¿5? or C¿1?-C¿10?alkoxy)alkyl, linear or branched C¿1?-C¿20?(C¿1?-C¿5? or C¿1?-C¿10?alkylthio)alkyl, benzoyl, aroyl, heteraroyl, phenyl, aryl, heteroaryl, halogen, hydroxyl, formyl, acetyl, linear or branched C¿3?-C¿20? alkenoyl, linear or branched C¿5?-C¿20? polyalkenoyl, nitrile, carboxyl, C¿1?-C¿20? or C¿1?-C¿5? alkoxycarbonyl, C¿1?-C¿20? $i(N)-alkylamido, C¿1?-C¿20? or C¿1?-C¿5? $i(N, N)-dialkylamido, amido, nitro, amino, C¿1?-C¿20? or C¿1?-C¿5? alkylamino, C¿1?-C¿20? dialkylamino, C¿2?-C¿20? dialkenylamino, C¿4?-C¿20?di(polyalkenyl)amino, arylamino, diarylamino, C¿1?-C¿20? alkylarylamino, cyclic-amino groups, arylsulfanyl, aryloxy, arylsulfinyl, arylsulfonyl, linear or branched C¿1?-C¿20? alkylsulfonyl, and di-(C¿1?-C¿10? or C¿1?-C¿20? alkoxyalkyl)phosphonyl and X includes O, S, NH, or the function R?8¿X is selected from aziridino, mono- or poly- substituted linear or branched C¿1?-C¿20? alkyl aziridino, pyrrolidino, mono- or poly- substituted linear or branched C¿1?-C¿20? alkyo pyrrolidino, piperidino, mono- or poly- substituted linear or branched C¿1?-C¿20? alkyl piperidino, morpholino, mono- or poly- substituted linear or branched C¿1?-C¿20? alkyl morpholino, thiomorpholino, mono- or poly- substituted linear or branched C¿1?-C¿20? alkyl thiomorpholino, indolino, mono- or poly- substituted linear or branched C¿1?-C¿20? alkyl indolino, piperazino, mono- or poly- substituted linear or branched C¿1?-C¿20? alkyl piperazino, linear or branched C¿1?-C¿20?$i(N)-alkylpiperazino, linear or branched C¿1?-C¿20?$i(N)-hydroxyalkylpiperazino, $i(N)-phenylpiperazino, $i(N)-aryliperazino, homopiperidino, mono- or poly- substituted linear or branched C¿1?-C¿20? alkyl homopiperidino, $i(N)-indolinyl, $i(N)-1,2,3,4-tetrahydroquinolinyl, $i(N)-1,2,3,4,4a-hexahydrocarbazolyl. The compounds may be combined with polymeric host material such as plastic or glass or make a sunglass lens, an ophthalmic lens or a window. The compounds may also be included in an ink or a fuel.', 'creators_id' => 'c.gabbutt@hud.ac.uk', 'contributors_name_lineage' => undef, 'userid' => '3494', 'patent_applicant' => 'James Robinson Ltd', 'monograph_type' => undef, 'datestamp_minute' => '59', 'lyricists_name_family' => undef, 'sword_slug' => undef, 'id_number' => 'WO/2000/035902 ', 'volume' => undef, 'gscholar_datestamp_month' => undef, 'conductors_id' => undef, 'suggestions' => undef, 'referencetext' => undef, 'date_year' => '2000', 'status_changed_hour' => '13', 'gscholar_cluster' => undef, 'producers_name_family' => undef }, '15036' => { 'funders' => undef, 'conductors_name_family' => undef, 'num_pieces' => undef, 'department' => undef, 'contributors_id' => undef, 'gscholar_datestamp_second' => undef, 'keywords' => undef, 'lyricists_name_lineage' => undef, 'lyricists_id' => undef, 'edit_lock_since' => '1350553719', 'creatorlist' => { '1' => { 'creators_name_lineage' => '', 'creators_name_family' => 'Hepworth', 'eprintid' => '15036', 'creators_name_honourific' => '', 'pos' => '1', 'creators_name_given' => 'John D.', 'creators_id' => undef }, '0' => { 'creators_name_lineage' => '', 'creators_name_family' => 'Gabbutt', 'eprintid' => '15036', 'creators_name_honourific' => '', 'pos' => '0', 'creators_name_given' => 'Christopher D.', 'creators_id' => 'c.gabbutt@hud.ac.uk' }, '3' => { 'creators_name_lineage' => '', 'creators_name_family' => 'Partington', 'eprintid' => '15036', 'creators_name_honourific' => '', 'pos' => '3', 'creators_name_given' => 'Steven M.', 'creators_id' => undef }, '2' => { 'creators_name_lineage' => '', 'creators_name_family' => 'Heron', 'eprintid' => '15036', 'creators_name_honourific' => '', 'pos' => '2', 'creators_name_given' => 'B. Mark', 'creators_id' => 'm.heron@hud.ac.uk' } }, 'exhibitors_id' => undef, 'latitude' => undef, 'replacedby' => undef, 'status_changed_month' => '9', 'editors_name_honourific' => undef, 'admin_note' => undef, 'event_title' => undef, 'date_type' => 'published', 'pres_type' => undef, 'longitude' => undef, 'creators_name_honourific' => '', 'include_in_hebci' => 'no', 'producers_name_honourific' => undef, 'scopus_citation_count' => undef, 'datestamp_year' => '2012', 'fileinfo' => '', 'status_changed_second' => '17', 'exhibitors_name_honourific' => undef, 'editors_id' => undef, 'title' => 'Protolysis of Spironaphtho(aza)pyranoindoles', 'corp_creators' => undef, 'contributors_name_given' => undef, 'alt_title' => undef, 'contributors_name_family' => undef, 'sponsors' => undef, 'output_media' => undef, 'editors_name_lineage' => undef, 'dir' => 'disk0/00/01/50/36', 'overlay_journal_id' => undef, 'gscholar_datestamp_year' => undef, 'ispublished' => 'pub', 'item_issues_count' => '0', 'conductors_name_given' => undef, 'sword_depositor' => undef, 'full_text_status' => 'none', 'lastmod_minute' => '48', 'refereed' => 'FALSE', 'contact_email' => 'c.gabbutt@hud.ac.uk', 'copyright_holders' => undef, 'date_day' => undef, 'gscholar_impact' => undef, 'official_url' => 'http://dx.doi.org/10.1080/10587250008023939', 'succeeds' => undef, 'datestamp_month' => '9', 'commentary' => undef, 'lastmod_day' => '18', 'publisher' => 'Taylor & Francis', 'pagerange' => '323-328', 'include_in_pedagogical' => 'no', 'task_purpose' => undef, 'status_changed_year' => '2012', 'book_title' => undef, 'thesis_name' => undef, 'event_location' => undef, 'type' => 'article', 'publication' => 'Molecular Crystals and Liquid Crystals Science and Technology. 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Whilst these compounds exhibit no observable photochromic properties at ambient temperature, protonation results in ring opening to give stable, intensely coloured dyes. Recyclisation and decolouration result on basification.', 'creators_id' => 'c.gabbutt@hud.ac.uk', 'contributors_name_lineage' => undef, 'userid' => '3483', 'patent_applicant' => undef, 'monograph_type' => undef, 'datestamp_minute' => '54', 'lyricists_name_family' => undef, 'sword_slug' => undef, 'id_number' => 'doi:10.1080/10587250008023939', 'volume' => '345', 'gscholar_datestamp_month' => undef, 'conductors_id' => undef, 'suggestions' => undef, 'referencetext' => undef, 'date_year' => '2000', 'status_changed_hour' => '8', 'gscholar_cluster' => undef, 'producers_name_family' => undef }, '14937' => { 'funders' => undef, 'conductors_name_family' => undef, 'num_pieces' => undef, 'department' => undef, 'contributors_id' => undef, 'gscholar_datestamp_second' => undef, 'keywords' => undef, 'lyricists_name_lineage' => undef, 'lyricists_id' => undef, 'edit_lock_since' => '1350549628', 'creatorlist' => { '1' => { 'creators_name_lineage' => '', 'creators_name_family' => 'Heron', 'eprintid' => '14937', 'creators_name_honourific' => '', 'pos' => '1', 'creators_name_given' => 'B. 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A 2,2-diaryl-6-styryl-2H-[1]benzopyran resulted from the condensation between 4-hydroxystilbene and a 1,1-diarylpropynol and which exhibited photochromism through the reversible electrocyclisation of the pyran unit; no isomerisation – electrocyclisation of the stilbene moiety was detected. 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The vibrational frequencies and contribution to first hyperpolarizabilities of the four naphthopyrans were determined at the B3LYP/6-31G (d,p) level.Comparison of the experimental and theoretical vibrational frequencies of the naphthopyrans was made. The assignments of the vibrational spectra have been carried out with the help of normal coordinate analysis (NCA). These results show that the ratio between pure vibrational contribution to the electronic contribution of first hyperpolarizability (?v/?e) increases when the 4-methoxyphenyl groups inthe symmetrical isomers is replaced by 4-morpholinophenyl and phenyl group resulting in an asymmet-rically substituted isomer pair. At the static limit, the low vibrational frequency modes have dominating contributions to the vibrational dipole polarizability and first hyperpolarizability.', 'creators_id' => 'c.gabbutt@hud.ac.uk', 'contributors_name_lineage' => undef, 'userid' => '13705', 'patent_applicant' => undef, 'monograph_type' => undef, 'datestamp_minute' => '54', 'lyricists_name_family' => undef, 'sword_slug' => undef, 'id_number' => '10.1016/j.vibspec.2013.09.010', 'volume' => '69', 'gscholar_datestamp_month' => undef, 'conductors_id' => undef, 'suggestions' => undef, 'referencetext' => undef, 'date_year' => '2013', 'status_changed_hour' => '16', 'gscholar_cluster' => undef, 'producers_name_family' => undef }, '16420' => { 'funders' => undef, 'conductors_name_family' => undef, 'num_pieces' => undef, 'department' => undef, 'contributors_id' => undef, 'gscholar_datestamp_second' => undef, 'keywords' => undef, 'lyricists_name_lineage' => undef, 'lyricists_id' => undef, 'edit_lock_since' => '1357221252', 'creatorlist' => { '1' => { 'creators_name_lineage' => '', 'creators_name_family' => 'Gabbutt', 'eprintid' => '16420', 'creators_name_honourific' => '', 'pos' => '1', 'creators_name_given' => 'Christopher D.', 'creators_id' => 'c.gabbutt@hud.ac.uk' }, '4' => { 'creators_name_lineage' => '', 'creators_name_family' => 'Smith', 'eprintid' => '16420', 'creators_name_honourific' => '', 'pos' => '4', 'creators_name_given' => 'Nicola Jane', 'creators_id' => undef }, '0' => { 'creators_name_lineage' => '', 'creators_name_family' => 'Aiken', 'eprintid' => '16420', 'creators_name_honourific' => '', 'pos' => '0', 'creators_name_given' => 'Stuart', 'creators_id' => 's.aiken@hud.ac.uk' }, '3' => { 'creators_name_lineage' => '', 'creators_name_family' => 'Kershaw', 'eprintid' => '16420', 'creators_name_honourific' => '', 'pos' => '3', 'creators_name_given' => 'Christopher', 'creators_id' => undef }, '2' => { 'creators_name_lineage' => '', 'creators_name_family' => 'Heron', 'eprintid' => '16420', 'creators_name_honourific' => '', 'pos' => '2', 'creators_name_given' => 'B. Mark', 'creators_id' => 'm.heron@hud.ac.uk' }, '5' => { 'creators_name_lineage' => '', 'creators_name_family' => 'Cano', 'eprintid' => '16420', 'creators_name_honourific' => '', 'pos' => '5', 'creators_name_given' => 'Jean Paul', 'creators_id' => undef } }, 'exhibitors_id' => undef, 'latitude' => undef, 'replacedby' => undef, 'status_changed_month' => '1', 'editors_name_honourific' => undef, 'admin_note' => undef, 'event_title' => undef, 'date_type' => 'published', 'pres_type' => undef, 'longitude' => undef, 'creators_name_honourific' => '', 'include_in_hebci' => 'no', 'producers_name_honourific' => undef, 'scopus_citation_count' => undef, 'datestamp_year' => '2013', 'fileinfo' => '', 'status_changed_second' => '46', 'exhibitors_name_honourific' => undef, 'editors_id' => undef, 'title' => 'Photochromic Dichroic Naphthopyrans and Optical Articles Containing them', 'corp_creators' => 'Essilor International', 'contributors_name_given' => undef, 'alt_title' => undef, 'contributors_name_family' => undef, 'sponsors' => undef, 'output_media' => undef, 'editors_name_lineage' => undef, 'dir' => 'disk0/00/01/64/20', 'overlay_journal_id' => undef, 'gscholar_datestamp_year' => undef, 'ispublished' => 'pub', 'item_issues_count' => '1', 'conductors_name_given' => undef, 'sword_depositor' => undef, 'full_text_status' => 'none', 'lastmod_minute' => '59', 'refereed' => undef, 'contact_email' => 'm.heron@hud.ac.uk', 'copyright_holders' => undef, 'date_day' => 11, 'gscholar_impact' => undef, 'official_url' => 'http://patentscope.wipo.int/search/en/WO2009109546', 'succeeds' => undef, 'datestamp_month' => '1', 'commentary' => undef, 'lastmod_day' => '3', 'publisher' => undef, 'pagerange' => undef, 'include_in_pedagogical' => 'no', 'task_purpose' => undef, 'status_changed_year' => '2013', 'book_title' => undef, 'thesis_name' => undef, 'event_location' => undef, 'type' => 'patent', 'publication' => undef, 'lastmod_second' => '46', 'place_of_pub' => undef, 'contributors_name_honourific' => undef, 'gscholar_datestamp_day' => undef, 'issn' => undef, 'datestamp_hour' => '13', 'exhibitors_name_given' => undef, 'creators_name_family' => 'Gabbutt', 'composition_type' => undef, 'producers_id' => undef, 'datestamp_second' => '46', 'note' => undef, 'edit_lock_until' => '0', 'editor_note' => undef, 'pedagogic_type' => undef, 'date_month' => 9, 'rights' => undef, 'contributors_type' => undef, 'scopus_id' => undef, 'eprintid' => '16420', 'producers_name_given' => undef, 'thesis_type' => undef, 'projects' => undef, 'lastmod_year' => '2013', 'data_type' => undef, 'gscholar_datestamp_minute' => undef, 'editors_name_given' => undef, 'isbn' => undef, 'include_in_cv' => 'yes', 'editors_name_family' => undef, 'lastmod_month' => '1', 'event_dates' => undef, 'fulltimestamp' => '20090911', 'learning_level' => undef, 'conductors_name_lineage' => undef, 'pages' => undef, 'source' => undef, 'lastmod_hour' => '13', 'number' => undef, 'rev_number' => '8', 'edit_lock_user' => '6', 'series' => undef, 'creators_name_lineage' => '', 'pos' => '1', 'metadata_visibility' => 'show', 'eprint_status' => 'archive', 'creators_name_given' => 'Christopher D.', 'exhibitors_name_lineage' => undef, 'divisions' => 'sas', 'institution' => undef, 'subjects' => 'QD', 'gscholar_datestamp_hour' => undef, 'producers_name_lineage' => undef, 'lyricists_name_given' => undef, 'completion_time' => undef, 'status_changed_minute' => '59', 'conductors_name_honourific' => undef, 'exhibitors_name_family' => undef, 'lyricists_name_honourific' => undef, 'event_type' => undef, 'importid' => undef, 'status_changed_day' => '3', 'datestamp_day' => '3', 'abstract' => '(EN)A naphthopyran compound represented by the formulae (I) to (II) wherein : ? mi, Hi2, p, q are each an integer comprised from O to 4 or 5 inclusive; ? Ri, R2 and R4, represent a group selected from halogen, H, -Ra, aryl, -OH, -ORa, -SH, -SRa, -NH2, -NR8RaI, -NRbRc, -NRalCORa, -NRaiCO(aryl), -NRai aryl, -N-aryfe, -N(aryl)CO(aryl), -CO-R3, -CO2R3I, -OC(O)-Rd, and -X-(Re)-Y, and linear or branched (Ci-Ci8) perfluoroalkyl group, wherein R3, Rai, Rb, Rc, X, Y, Re, Rd are as defined into the description; ? Zi re resent a group selected from: (formules) (FR)L'invention porte sur un composé naphtopyrane représenté par les formules (I) à (II) dans lesquelles : ? mi, Hi2, p, q sont chacun un entier compris entre 0 à 4 ou 5 inclus ; ? Ri, R2 et R4 représentent un groupe choisi parmi halogène, H, -Ra, aryle, -OH, -ORa, -SH, -SRa, -NH2, -NR8RaI, -NRbRc, -NRalCORa, -NRaiCO(aryle), -NRai aryle, -N-aryle, -N(aryl)CO(aryle), -CO-R3, -CO2R3I, -OC(O)-Rd et -X-(Re)-Y et un groupe perfluoroalkyle en C1-C18 linéaire ou ramifié, où R3, Rai, Rb, Rc, X, Y, Re, Rd sont tels que définis dans la description ; ? Zi représente un groupe choisi parmi : (formules).', 'creators_id' => 'c.gabbutt@hud.ac.uk', 'contributors_name_lineage' => undef, 'userid' => '6', 'patent_applicant' => 'Essilor International S.A', 'monograph_type' => undef, 'datestamp_minute' => '59', 'lyricists_name_family' => undef, 'sword_slug' => undef, 'id_number' => 'WO/2009109546', 'volume' => undef, 'gscholar_datestamp_month' => undef, 'conductors_id' => undef, 'suggestions' => undef, 'referencetext' => undef, 'date_year' => '2009', 'status_changed_hour' => '13', 'gscholar_cluster' => undef, 'producers_name_family' => undef }, '15037' => { 'funders' => undef, 'conductors_name_family' => undef, 'num_pieces' => undef, 'department' => undef, 'contributors_id' => undef, 'gscholar_datestamp_second' => undef, 'keywords' => undef, 'lyricists_name_lineage' => undef, 'lyricists_id' => undef, 'edit_lock_since' => '1350553621', 'creatorlist' => { '1' => { 'creators_name_lineage' => '', 'creators_name_family' => 'Hepworth', 'eprintid' => '15037', 'creators_name_honourific' => '', 'pos' => '1', 'creators_name_given' => 'John D.', 'creators_id' => undef }, '0' => { 'creators_name_lineage' => '', 'creators_name_family' => 'Gabbutt', 'eprintid' => '15037', 'creators_name_honourific' => '', 'pos' => '0', 'creators_name_given' => 'Christopher D.', 'creators_id' => 'c.gabbutt@hud.ac.uk' }, '3' => { 'creators_name_lineage' => '', 'creators_name_family' => 'Partington', 'eprintid' => '15037', 'creators_name_honourific' => '', 'pos' => '3', 'creators_name_given' => 'Steven M.', 'creators_id' => undef }, '2' => { 'creators_name_lineage' => '', 'creators_name_family' => 'Heron', 'eprintid' => '15037', 'creators_name_honourific' => '', 'pos' => '2', 'creators_name_given' => 'B. Mark', 'creators_id' => 'm.heron@hud.ac.uk' } }, 'exhibitors_id' => undef, 'latitude' => undef, 'replacedby' => undef, 'status_changed_month' => '9', 'editors_name_honourific' => undef, 'admin_note' => undef, 'event_title' => undef, 'date_type' => 'published', 'pres_type' => undef, 'longitude' => undef, 'creators_name_honourific' => '', 'include_in_hebci' => 'no', 'producers_name_honourific' => undef, 'scopus_citation_count' => undef, 'datestamp_year' => '2012', 'fileinfo' => '', 'status_changed_second' => '15', 'exhibitors_name_honourific' => undef, 'editors_id' => undef, 'title' => 'Photochromism of some thienobenzopyrans', 'corp_creators' => undef, 'contributors_name_given' => undef, 'alt_title' => undef, 'contributors_name_family' => undef, 'sponsors' => undef, 'output_media' => undef, 'editors_name_lineage' => undef, 'dir' => 'disk0/00/01/50/37', 'overlay_journal_id' => undef, 'gscholar_datestamp_year' => undef, 'ispublished' => 'pub', 'item_issues_count' => '0', 'conductors_name_given' => undef, 'sword_depositor' => undef, 'full_text_status' => 'none', 'lastmod_minute' => '47', 'refereed' => 'TRUE', 'contact_email' => 'c.gabbutt@hud.ac.uk', 'copyright_holders' => undef, 'date_day' => undef, 'gscholar_impact' => undef, 'official_url' => 'http://dx.doi.org/10.1016/S0143-7208(00)00065-6', 'succeeds' => undef, 'datestamp_month' => '9', 'commentary' => undef, 'lastmod_day' => '18', 'publisher' => 'Pergamon', 'pagerange' => '73-77', 'include_in_pedagogical' => 'no', 'task_purpose' => undef, 'status_changed_year' => '2012', 'book_title' => undef, 'thesis_name' => undef, 'event_location' => undef, 'type' => 'article', 'publication' => 'Dyes and Pigments', 'lastmod_second' => '18', 'place_of_pub' => undef, 'contributors_name_honourific' => undef, 'gscholar_datestamp_day' => undef, 'issn' => '0143-7208', 'datestamp_hour' => '8', 'exhibitors_name_given' => undef, 'creators_name_family' => 'Gabbutt', 'composition_type' => undef, 'producers_id' => undef, 'datestamp_second' => '15', 'note' => undef, 'edit_lock_until' => '0', 'editor_note' => undef, 'pedagogic_type' => undef, 'date_month' => 10, 'rights' => undef, 'contributors_type' => undef, 'scopus_id' => undef, 'eprintid' => '15037', 'producers_name_given' => undef, 'thesis_type' => undef, 'projects' => undef, 'lastmod_year' => '2012', 'data_type' => undef, 'gscholar_datestamp_minute' => undef, 'editors_name_given' => undef, 'isbn' => undef, 'include_in_cv' => 'yes', 'editors_name_family' => undef, 'lastmod_month' => '10', 'event_dates' => undef, 'fulltimestamp' => '20001000', 'learning_level' => undef, 'conductors_name_lineage' => undef, 'pages' => undef, 'source' => undef, 'lastmod_hour' => '9', 'number' => '1-2', 'rev_number' => '11', 'edit_lock_user' => '3483', 'series' => undef, 'creators_name_lineage' => '', 'pos' => '1', 'metadata_visibility' => 'show', 'eprint_status' => 'archive', 'creators_name_given' => 'Christopher D.', 'exhibitors_name_lineage' => undef, 'divisions' => 'sas', 'institution' => undef, 'subjects' => 'QD', 'gscholar_datestamp_hour' => undef, 'producers_name_lineage' => undef, 'lyricists_name_given' => undef, 'completion_time' => undef, 'status_changed_minute' => '58', 'conductors_name_honourific' => undef, 'exhibitors_name_family' => undef, 'lyricists_name_honourific' => undef, 'event_type' => undef, 'importid' => undef, 'status_changed_day' => '25', 'datestamp_day' => '25', 'abstract' => 'Some novel thienobenzopyrans have been synthesised and their photochromic properties are discussed. ', 'creators_id' => 'c.gabbutt@hud.ac.uk', 'contributors_name_lineage' => undef, 'userid' => '3483', 'patent_applicant' => undef, 'monograph_type' => undef, 'datestamp_minute' => '58', 'lyricists_name_family' => undef, 'sword_slug' => undef, 'id_number' => 'doi:10.1016/S0143-7208(00)00065-6', 'volume' => '47', 'gscholar_datestamp_month' => undef, 'conductors_id' => undef, 'suggestions' => undef, 'referencetext' => undef, 'date_year' => '2000', 'status_changed_hour' => '8', 'gscholar_cluster' => undef, 'producers_name_family' => undef }, '14989' => { 'funders' => undef, 'conductors_name_family' => undef, 'num_pieces' => undef, 'department' => undef, 'contributors_id' => undef, 'gscholar_datestamp_second' => undef, 'keywords' => undef, 'lyricists_name_lineage' => undef, 'lyricists_id' => undef, 'edit_lock_since' => '1350554043', 'creatorlist' => { '1' => { 'creators_name_lineage' => '', 'creators_name_family' => 'Hepworth', 'eprintid' => '14989', 'creators_name_honourific' => '', 'pos' => '1', 'creators_name_given' => 'John D', 'creators_id' => undef }, '0' => { 'creators_name_lineage' => '', 'creators_name_family' => 'Gabbutt', 'eprintid' => '14989', 'creators_name_honourific' => '', 'pos' => '0', 'creators_name_given' => 'Christopher D.', 'creators_id' => 'c.gabbutt@hud.ac.uk' }, '2' => { 'creators_name_lineage' => '', 'creators_name_family' => 'Heron', 'eprintid' => '14989', 'creators_name_honourific' => '', 'pos' => '2', 'creators_name_given' => 'B. Mark', 'creators_id' => 'm.heron@hud.ac.uk' } }, 'exhibitors_id' => undef, 'latitude' => undef, 'replacedby' => undef, 'status_changed_month' => '9', 'editors_name_honourific' => undef, 'admin_note' => undef, 'event_title' => undef, 'date_type' => 'published', 'pres_type' => undef, 'longitude' => undef, 'creators_name_honourific' => '', 'include_in_hebci' => 'no', 'producers_name_honourific' => undef, 'scopus_citation_count' => undef, 'datestamp_year' => '2012', 'fileinfo' => '', 'status_changed_second' => '9', 'exhibitors_name_honourific' => undef, 'editors_id' => undef, 'title' => 'Synthesis and reactivity of some thiochroman-3,4-diones.', 'corp_creators' => undef, 'contributors_name_given' => undef, 'alt_title' => undef, 'contributors_name_family' => undef, 'sponsors' => undef, 'output_media' => undef, 'editors_name_lineage' => undef, 'dir' => 'disk0/00/01/49/89', 'overlay_journal_id' => undef, 'gscholar_datestamp_year' => undef, 'ispublished' => 'pub', 'item_issues_count' => '0', 'conductors_name_given' => undef, 'sword_depositor' => undef, 'full_text_status' => 'none', 'lastmod_minute' => '54', 'refereed' => 'TRUE', 'contact_email' => 'c.gabbutt@hud.ac.uk', 'copyright_holders' => undef, 'date_day' => undef, 'gscholar_impact' => undef, 'official_url' => 'http://dx.doi.org/10.1016/S0040-4020(01)85270-4', 'succeeds' => undef, 'datestamp_month' => '9', 'commentary' => undef, 'lastmod_day' => '18', 'publisher' => 'Elsevier', 'pagerange' => '7865-7878', 'include_in_pedagogical' => 'no', 'task_purpose' => undef, 'status_changed_year' => '2012', 'book_title' => undef, 'thesis_name' => undef, 'event_location' => undef, 'type' => 'article', 'publication' => 'Tetrahedron', 'lastmod_second' => '13', 'place_of_pub' => undef, 'contributors_name_honourific' => undef, 'gscholar_datestamp_day' => undef, 'issn' => '0040-4020', 'datestamp_hour' => '11', 'exhibitors_name_given' => undef, 'creators_name_family' => 'Gabbutt', 'composition_type' => undef, 'producers_id' => undef, 'datestamp_second' => '9', 'note' => undef, 'edit_lock_until' => '0', 'editor_note' => undef, 'pedagogic_type' => undef, 'date_month' => 6, 'rights' => undef, 'contributors_type' => undef, 'scopus_id' => undef, 'eprintid' => '14989', 'producers_name_given' => undef, 'thesis_type' => undef, 'projects' => undef, 'lastmod_year' => '2012', 'data_type' => undef, 'gscholar_datestamp_minute' => undef, 'editors_name_given' => undef, 'isbn' => undef, 'include_in_cv' => 'yes', 'editors_name_family' => undef, 'lastmod_month' => '10', 'event_dates' => undef, 'fulltimestamp' => '19940600', 'learning_level' => undef, 'conductors_name_lineage' => undef, 'pages' => undef, 'source' => undef, 'lastmod_hour' => '9', 'number' => '26', 'rev_number' => '11', 'edit_lock_user' => '3483', 'series' => undef, 'creators_name_lineage' => '', 'pos' => '1', 'metadata_visibility' => 'show', 'eprint_status' => 'archive', 'creators_name_given' => 'Christopher D.', 'exhibitors_name_lineage' => undef, 'divisions' => 'sas', 'institution' => undef, 'subjects' => 'QD', 'gscholar_datestamp_hour' => undef, 'producers_name_lineage' => undef, 'lyricists_name_given' => undef, 'completion_time' => undef, 'status_changed_minute' => '51', 'conductors_name_honourific' => undef, 'exhibitors_name_family' => undef, 'lyricists_name_honourific' => undef, 'event_type' => undef, 'importid' => undef, 'status_changed_day' => '20', 'datestamp_day' => '20', 'abstract' => 'Thiochroman-3,4-diones, which result from the reaction of thiochroman-4-ones with isoamyl nitrite, form fused heterocycles on reaction with 1,2-diamines and with p-anisaldehyde and ammonium acetate. Cyclopenta-[c][1]benzothiopyran-2-one, formed on reaction with dibenzyl ketone, yields a dibenzo[bd]thiopyran after cycloaddition of DMAD. With methyl magnesium iodide, a mixture of thiochroman-3-and 4-ols is fomed which was separated only after the selective dehydration of the 4-ol. The resulting 4-methylene derivative was isolated as the hetero Diels-Alder spiro-liked adduct', 'creators_id' => 'c.gabbutt@hud.ac.uk', 'contributors_name_lineage' => undef, 'userid' => '3483', 'patent_applicant' => undef, 'monograph_type' => undef, 'datestamp_minute' => '51', 'lyricists_name_family' => undef, 'sword_slug' => undef, 'id_number' => 'doi:10.1016/S0040-4020(01)85270-4', 'volume' => '50', 'gscholar_datestamp_month' => undef, 'conductors_id' => undef, 'suggestions' => undef, 'referencetext' => undef, 'date_year' => '1994', 'status_changed_hour' => '11', 'gscholar_cluster' => undef, 'producers_name_family' => undef }, '14999' => { 'funders' => undef, 'conductors_name_family' => undef, 'num_pieces' => undef, 'department' => undef, 'contributors_id' => undef, 'gscholar_datestamp_second' => undef, 'keywords' => undef, 'lyricists_name_lineage' => undef, 'lyricists_id' => undef, 'edit_lock_since' => '1350553811', 'creatorlist' => { '1' => { 'creators_name_lineage' => '', 'creators_name_family' => 'Hepworth', 'eprintid' => '14999', 'creators_name_honourific' => '', 'pos' => '1', 'creators_name_given' => 'John D.', 'creators_id' => undef }, '4' => { 'creators_name_lineage' => '', 'creators_name_family' => 'Clegg', 'eprintid' => '14999', 'creators_name_honourific' => '', 'pos' => '4', 'creators_name_given' => 'William', 'creators_id' => undef }, '0' => { 'creators_name_lineage' => '', 'creators_name_family' => 'Gabbutt', 'eprintid' => '14999', 'creators_name_honourific' => '', 'pos' => '0', 'creators_name_given' => 'Christopher D.', 'creators_id' => 'c.gabbutt@hud.ac.uk' }, '3' => { 'creators_name_lineage' => '', 'creators_name_family' => 'Elsegood', 'eprintid' => '14999', 'creators_name_honourific' => '', 'pos' => '3', 'creators_name_given' => 'Mark R. J.', 'creators_id' => undef }, '2' => { 'creators_name_lineage' => '', 'creators_name_family' => 'Heron', 'eprintid' => '14999', 'creators_name_honourific' => '', 'pos' => '2', 'creators_name_given' => 'B. Mark', 'creators_id' => 'm.heron@hud.ac.uk' } }, 'exhibitors_id' => undef, 'latitude' => undef, 'replacedby' => undef, 'status_changed_month' => '9', 'editors_name_honourific' => undef, 'admin_note' => undef, 'event_title' => undef, 'date_type' => 'published', 'pres_type' => undef, 'longitude' => undef, 'creators_name_honourific' => '', 'include_in_hebci' => 'no', 'producers_name_honourific' => undef, 'scopus_citation_count' => undef, 'datestamp_year' => '2012', 'fileinfo' => '', 'status_changed_second' => '25', 'exhibitors_name_honourific' => undef, 'editors_id' => undef, 'title' => 'An unusual ring expansion from the Zav’yalov pyrrole synthesis: formation of oxacino[2,3-c]pyrroles', 'corp_creators' => undef, 'contributors_name_given' => undef, 'alt_title' => undef, 'contributors_name_family' => undef, 'sponsors' => undef, 'output_media' => undef, 'editors_name_lineage' => undef, 'dir' => 'disk0/00/01/49/99', 'overlay_journal_id' => undef, 'gscholar_datestamp_year' => undef, 'ispublished' => 'pub', 'item_issues_count' => '0', 'conductors_name_given' => undef, 'sword_depositor' => undef, 'full_text_status' => 'none', 'lastmod_minute' => '50', 'refereed' => 'TRUE', 'contact_email' => 'c.gabbutt@hud.ac.uk', 'copyright_holders' => undef, 'date_day' => undef, 'gscholar_impact' => undef, 'official_url' => 'http://dx.doi.org/10.1039/A809033E', 'succeeds' => undef, 'datestamp_month' => '9', 'commentary' => undef, 'lastmod_day' => '18', 'publisher' => 'Royal Society of Chemistry', 'pagerange' => '289-290', 'include_in_pedagogical' => 'no', 'task_purpose' => undef, 'status_changed_year' => '2012', 'book_title' => undef, 'thesis_name' => undef, 'event_location' => undef, 'type' => 'article', 'publication' => 'Chemical Communications', 'lastmod_second' => '22', 'place_of_pub' => undef, 'contributors_name_honourific' => undef, 'gscholar_datestamp_day' => undef, 'issn' => '1359-7345', 'datestamp_hour' => '12', 'exhibitors_name_given' => undef, 'creators_name_family' => 'Gabbutt', 'composition_type' => undef, 'producers_id' => undef, 'datestamp_second' => '25', 'note' => undef, 'edit_lock_until' => '0', 'editor_note' => undef, 'pedagogic_type' => undef, 'date_month' => 3, 'rights' => undef, 'contributors_type' => undef, 'scopus_id' => undef, 'eprintid' => '14999', 'producers_name_given' => undef, 'thesis_type' => undef, 'projects' => undef, 'lastmod_year' => '2012', 'data_type' => undef, 'gscholar_datestamp_minute' => undef, 'editors_name_given' => undef, 'isbn' => undef, 'include_in_cv' => 'yes', 'editors_name_family' => undef, 'lastmod_month' => '10', 'event_dates' => undef, 'fulltimestamp' => '19990300', 'learning_level' => undef, 'conductors_name_lineage' => undef, 'pages' => undef, 'source' => undef, 'lastmod_hour' => '9', 'number' => '3', 'rev_number' => '11', 'edit_lock_user' => '3483', 'series' => undef, 'creators_name_lineage' => '', 'pos' => '1', 'metadata_visibility' => 'show', 'eprint_status' => 'archive', 'creators_name_given' => 'Christopher D.', 'exhibitors_name_lineage' => undef, 'divisions' => 'sas', 'institution' => undef, 'subjects' => 'QD', 'gscholar_datestamp_hour' => undef, 'producers_name_lineage' => undef, 'lyricists_name_given' => undef, 'completion_time' => undef, 'status_changed_minute' => '57', 'conductors_name_honourific' => undef, 'exhibitors_name_family' => undef, 'lyricists_name_honourific' => undef, 'event_type' => undef, 'importid' => undef, 'status_changed_day' => '20', 'datestamp_day' => '20', 'abstract' => 'Enamino acids 2 and 5 undergo a facile cyclisation to afford the pyrrole 3 and isoindole 6 ring systems; a novel two atom ring expansion ensues when derivatives 5b,d are subjected to the cyclisation conditions, resulting in the formation of the new oxacino[2,3-c]pyrrole system, the structure of which is confirmed by X-ray crystallography. ', 'creators_id' => 'c.gabbutt@hud.ac.uk', 'contributors_name_lineage' => undef, 'userid' => '3483', 'patent_applicant' => undef, 'monograph_type' => undef, 'datestamp_minute' => '57', 'lyricists_name_family' => undef, 'sword_slug' => undef, 'id_number' => 'doi:10.1039/A809033E', 'volume' => undef, 'gscholar_datestamp_month' => undef, 'conductors_id' => undef, 'suggestions' => undef, 'referencetext' => undef, 'date_year' => '1999', 'status_changed_hour' => '12', 'gscholar_cluster' => undef, 'producers_name_family' => undef }, '15649' => { 'funders' => undef, 'conductors_name_family' => undef, 'num_pieces' => undef, 'department' => undef, 'contributors_id' => undef, 'gscholar_datestamp_second' => undef, 'keywords' => undef, 'lyricists_name_lineage' => undef, 'lyricists_id' => undef, 'edit_lock_since' => '1350654680', 'creatorlist' => { '1' => { 'creators_name_lineage' => '', 'creators_name_family' => 'Heron', 'eprintid' => '15649', 'creators_name_honourific' => '', 'pos' => '1', 'creators_name_given' => 'B. Mark', 'creators_id' => 'm.heron@hud.ac.uk' }, '4' => { 'creators_name_lineage' => '', 'creators_name_family' => 'Partington', 'eprintid' => '15649', 'creators_name_honourific' => '', 'pos' => '4', 'creators_name_given' => 'Steven M.', 'creators_id' => undef }, '0' => { 'creators_name_lineage' => '', 'creators_name_family' => 'Clarke ', 'eprintid' => '15649', 'creators_name_honourific' => '', 'pos' => '0', 'creators_name_given' => 'David A.', 'creators_id' => undef }, '3' => { 'creators_name_lineage' => '', 'creators_name_family' => 'Hepworth', 'eprintid' => '15649', 'creators_name_honourific' => '', 'pos' => '3', 'creators_name_given' => 'John D.', 'creators_id' => undef }, '2' => { 'creators_name_lineage' => '', 'creators_name_family' => 'Gabbutt', 'eprintid' => '15649', 'creators_name_honourific' => '', 'pos' => '2', 'creators_name_given' => 'Christopher D.', 'creators_id' => 'c.gabbutt@hud.ac.uk' }, '5' => { 'creators_name_lineage' => '', 'creators_name_family' => 'Corns', 'eprintid' => '15649', 'creators_name_honourific' => '', 'pos' => '5', 'creators_name_given' => 'Stephen N.', 'creators_id' => undef } }, 'exhibitors_id' => undef, 'latitude' => undef, 'replacedby' => undef, 'status_changed_month' => '10', 'editors_name_honourific' => undef, 'admin_note' => undef, 'event_title' => undef, 'date_type' => 'published', 'pres_type' => undef, 'longitude' => undef, 'creators_name_honourific' => '', 'include_in_hebci' => 'no', 'producers_name_honourific' => undef, 'scopus_citation_count' => undef, 'datestamp_year' => '2012', 'fileinfo' => '', 'status_changed_second' => '13', 'exhibitors_name_honourific' => undef, 'editors_id' => undef, 'title' => 'Grey Colouring Photochromic Fused Pyrans', 'corp_creators' => 'James Robinson Ltd', 'contributors_name_given' => undef, 'alt_title' => undef, 'contributors_name_family' => undef, 'sponsors' => undef, 'output_media' => undef, 'editors_name_lineage' => undef, 'dir' => 'disk0/00/01/56/49', 'overlay_journal_id' => undef, 'gscholar_datestamp_year' => undef, 'ispublished' => 'pub', 'item_issues_count' => '0', 'conductors_name_given' => undef, 'sword_depositor' => undef, 'full_text_status' => 'none', 'lastmod_minute' => '52', 'refereed' => undef, 'contact_email' => undef, 'copyright_holders' => undef, 'date_day' => undef, 'gscholar_impact' => undef, 'official_url' => undef, 'succeeds' => undef, 'datestamp_month' => '10', 'commentary' => undef, 'lastmod_day' => '19', 'publisher' => undef, 'pagerange' => undef, 'include_in_pedagogical' => 'no', 'task_purpose' => undef, 'status_changed_year' => '2012', 'book_title' => undef, 'thesis_name' => undef, 'event_location' => undef, 'type' => 'patent', 'publication' => undef, 'lastmod_second' => '1', 'place_of_pub' => undef, 'contributors_name_honourific' => undef, 'gscholar_datestamp_day' => undef, 'issn' => undef, 'datestamp_hour' => '13', 'exhibitors_name_given' => undef, 'creators_name_family' => 'Gabbutt', 'composition_type' => undef, 'producers_id' => undef, 'datestamp_second' => '13', 'note' => undef, 'edit_lock_until' => '0', 'editor_note' => undef, 'pedagogic_type' => undef, 'date_month' => 4, 'rights' => undef, 'contributors_type' => undef, 'scopus_id' => undef, 'eprintid' => '15649', 'producers_name_given' => undef, 'thesis_type' => undef, 'projects' => undef, 'lastmod_year' => '2012', 'data_type' => undef, 'gscholar_datestamp_minute' => undef, 'editors_name_given' => undef, 'isbn' => undef, 'include_in_cv' => 'yes', 'editors_name_family' => undef, 'lastmod_month' => '10', 'event_dates' => undef, 'fulltimestamp' => '20000400', 'learning_level' => undef, 'conductors_name_lineage' => undef, 'pages' => undef, 'source' => undef, 'lastmod_hour' => '13', 'number' => undef, 'rev_number' => '5', 'edit_lock_user' => '3494', 'series' => undef, 'creators_name_lineage' => '', 'pos' => '0', 'metadata_visibility' => 'show', 'eprint_status' => 'archive', 'creators_name_given' => 'Christopher D.', 'exhibitors_name_lineage' => undef, 'divisions' => 'sas', 'institution' => undef, 'subjects' => 'QD', 'gscholar_datestamp_hour' => undef, 'producers_name_lineage' => undef, 'lyricists_name_given' => undef, 'completion_time' => undef, 'status_changed_minute' => '49', 'conductors_name_honourific' => undef, 'exhibitors_name_family' => undef, 'lyricists_name_honourific' => undef, 'event_type' => undef, 'importid' => undef, 'status_changed_day' => '19', 'datestamp_day' => '19', 'abstract' => 'A photochromic grey colouring 2$i(H)-naphtho[1,2-$i(b)]pyran of formula (I) wherein R?1¿ is selected from mono-, di- or poly-substituted aryl groups, mono-, di- or poly-substituted naphthyl groups and mono-, di- or poly-substituted heteroaryl groups, wherein at least one substituent is a nitrogen containing group, including amino, C¿1?-C¿20? and C¿6?-C¿20? alkylamino, C¿1?-C¿20? and C¿6?-C¿20? dialkylamino, C¿2?-C¿20? dialkenylamino, C¿2?-C¿20? or C¿4?-C¿20? di(polyalkenyl)amino, arylamino, diarylamino, C¿1?-C¿20? alkylarylamino, tetra (C¿1?-C¿10? linear or branched alkyl) guanidino and cyclic-amino groups and at least one of R?7¿ and R?9¿, which may be the same or different, is selected from C¿1?-C¿20? $i(N) alkylamino C¿1?-C¿20? $i(N)-alkylamido, C¿1?-C¿20? $i(N,N)-dialkylamido, amido, nitro, amino, C¿1?-C¿20? alkylamino, C¿1?-C¿20? dialkylamino, C¿2?-C¿20? dialkenylamino, C¿4?-C¿20? di(polyalkenyl)amino, arylamino, diarylamino, C¿1?-C¿20? alkylarylamino, or cyclicamino groups. The compounds may be combined with a polymeric host material such as plastic or glass to make a sunglass lens, an ophthalmic lens or a window. The compounds may also be included in an ink or a fuel.', 'creators_id' => 'c.gabbutt@hud.ac.uk', 'contributors_name_lineage' => undef, 'userid' => '3494', 'patent_applicant' => 'James Robinson Ltd', 'monograph_type' => undef, 'datestamp_minute' => '49', 'lyricists_name_family' => undef, 'sword_slug' => undef, 'id_number' => 'WO/2000/018755', 'volume' => undef, 'gscholar_datestamp_month' => undef, 'conductors_id' => undef, 'suggestions' => undef, 'referencetext' => undef, 'date_year' => '2000', 'status_changed_hour' => '13', 'gscholar_cluster' => undef, 'producers_name_family' => undef }, '14928' => { 'funders' => undef, 'conductors_name_family' => undef, 'num_pieces' => undef, 'department' => undef, 'contributors_id' => undef, 'gscholar_datestamp_second' => undef, 'keywords' => undef, 'lyricists_name_lineage' => undef, 'lyricists_id' => undef, 'edit_lock_since' => '1350549755', 'creatorlist' => { '1' => { 'creators_name_lineage' => '', 'creators_name_family' => 'Heron', 'eprintid' => '14928', 'creators_name_honourific' => '', 'pos' => '1', 'creators_name_given' => 'B. 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Irradiation of solutions of these naphthopyrans results in reversible electrocyclic ring-opening to afford photomerocyanines which possess an extended conjugated system and show a bathochromically-shifted ?max relative to the non-vinyl substituted analogues. ', 'creators_id' => 'c.gabbutt@hud.ac.uk', 'contributors_name_lineage' => undef, 'userid' => '3483', 'patent_applicant' => undef, 'monograph_type' => undef, 'datestamp_minute' => '47', 'lyricists_name_family' => undef, 'sword_slug' => undef, 'id_number' => 'doi:10.1039/C0OB00141D', 'volume' => '8', 'gscholar_datestamp_month' => undef, 'conductors_id' => undef, 'suggestions' => undef, 'referencetext' => undef, 'date_year' => '2010', 'status_changed_hour' => '10', 'gscholar_cluster' => undef, 'producers_name_family' => undef }, '14939' => { 'funders' => undef, 'conductors_name_family' => undef, 'num_pieces' => undef, 'department' => undef, 'contributors_id' => undef, 'gscholar_datestamp_second' => undef, 'keywords' => undef, 'lyricists_name_lineage' => undef, 'lyricists_id' => undef, 'edit_lock_since' => '1350549608', 'creatorlist' => { '1' => { 'creators_name_lineage' => '', 'creators_name_family' => 'Gibbons', 'eprintid' => '14939', 'creators_name_honourific' => '', 'pos' => '1', 'creators_name_given' => 'Lucy V.', 'creators_id' => undef }, '3' => { 'creators_name_lineage' => '', 'creators_name_family' => 'Kolla', 'eprintid' => '14939', 'creators_name_honourific' => '', 'pos' => '3', 'creators_name_given' => 'Suresh B.', 'creators_id' => undef }, '0' => { 'creators_name_lineage' => '', 'creators_name_family' => 'Gabbutt', 'eprintid' => '14939', 'creators_name_honourific' => '', 'pos' => '0', 'creators_name_given' => 'Christopher D.', 'creators_id' => 'c.gabbutt@hud.ac.uk' }, '2' => { 'creators_name_lineage' => '', 'creators_name_family' => 'Heron', 'eprintid' => '14939', 'creators_name_honourific' => '', 'pos' => '2', 'creators_name_given' => 'B. Mark', 'creators_id' => 'm.heron@hud.ac.uk' } }, 'exhibitors_id' => undef, 'latitude' => undef, 'replacedby' => undef, 'status_changed_month' => '9', 'editors_name_honourific' => undef, 'admin_note' => undef, 'event_title' => undef, 'date_type' => 'published', 'pres_type' => undef, 'longitude' => undef, 'creators_name_honourific' => '', 'include_in_hebci' => 'no', 'producers_name_honourific' => undef, 'scopus_citation_count' => undef, 'datestamp_year' => '2012', 'fileinfo' => '', 'status_changed_second' => '40', 'exhibitors_name_honourific' => undef, 'editors_id' => undef, 'title' => 'The intramolecular capture of thermally generated merocyanine dyes derived from naphthopyrans: Photochromism of 5-(diarylhydroxymethyl)-2H-naphtho[1,2-b]pyrans ', 'corp_creators' => undef, 'contributors_name_given' => undef, 'alt_title' => undef, 'contributors_name_family' => undef, 'sponsors' => undef, 'output_media' => undef, 'editors_name_lineage' => undef, 'dir' => 'disk0/00/01/49/39', 'overlay_journal_id' => undef, 'gscholar_datestamp_year' => undef, 'ispublished' => 'pub', 'item_issues_count' => '0', 'conductors_name_given' => undef, 'sword_depositor' => undef, 'full_text_status' => 'none', 'lastmod_minute' => '40', 'refereed' => 'TRUE', 'contact_email' => 'm.heron@hud.ac.uk', 'copyright_holders' => undef, 'date_day' => undef, 'gscholar_impact' => undef, 'official_url' => 'http://www.sciencedirect.com/science/article/pii/S0143720811002038', 'succeeds' => undef, 'datestamp_month' => '9', 'commentary' => undef, 'lastmod_day' => '18', 'publisher' => 'Pergamon', 'pagerange' => '995-1004', 'include_in_pedagogical' => 'no', 'task_purpose' => undef, 'status_changed_year' => '2012', 'book_title' => undef, 'thesis_name' => undef, 'event_location' => undef, 'type' => 'article', 'publication' => 'Dyes and Pigments', 'lastmod_second' => '20', 'place_of_pub' => undef, 'contributors_name_honourific' => undef, 'gscholar_datestamp_day' => undef, 'issn' => '0143-7208', 'datestamp_hour' => '11', 'exhibitors_name_given' => undef, 'creators_name_family' => 'Gabbutt', 'composition_type' => undef, 'producers_id' => undef, 'datestamp_second' => '40', 'note' => undef, 'edit_lock_until' => '0', 'editor_note' => undef, 'pedagogic_type' => undef, 'date_month' => 3, 'rights' => undef, 'contributors_type' => undef, 'scopus_id' => undef, 'eprintid' => '14939', 'producers_name_given' => undef, 'thesis_type' => undef, 'projects' => undef, 'lastmod_year' => '2012', 'data_type' => undef, 'gscholar_datestamp_minute' => undef, 'editors_name_given' => undef, 'isbn' => undef, 'include_in_cv' => 'yes', 'editors_name_family' => undef, 'lastmod_month' => '10', 'event_dates' => undef, 'fulltimestamp' => '20120300', 'learning_level' => undef, 'conductors_name_lineage' => undef, 'pages' => undef, 'source' => undef, 'lastmod_hour' => '8', 'number' => '3', 'rev_number' => '9', 'edit_lock_user' => '3483', 'series' => undef, 'creators_name_lineage' => '', 'pos' => '0', 'metadata_visibility' => 'show', 'eprint_status' => 'archive', 'creators_name_given' => 'Christopher D.', 'exhibitors_name_lineage' => undef, 'divisions' => 'sas', 'institution' => undef, 'subjects' => 'Q1', 'gscholar_datestamp_hour' => undef, 'producers_name_lineage' => undef, 'lyricists_name_given' => undef, 'completion_time' => undef, 'status_changed_minute' => '51', 'conductors_name_honourific' => undef, 'exhibitors_name_family' => undef, 'lyricists_name_honourific' => undef, 'event_type' => undef, 'importid' => undef, 'status_changed_day' => '18', 'datestamp_day' => '18', 'abstract' => 'A series of 2H-naphtho[1,2-b]pyrans bearing a diarylmethanol unit at C-5 have been synthesised by the addition of an excess of an aryllithium reagent to alkyl 2H-naphtho[1,2-b]pyran-5-carboxylate precursors. These naphthopyrans show photochromism when exposed to ultraviolet irradiation and also generate intense colours at low pH through triarylmethine cation generation. However, photochromism of the triarylmethine cation derived from the naphthopyran unit could not be detected. An irreversible cascade process initiated by the thermally-induced ring-opening of the diarylmethanol substituted 2H-naphtho[1,2-b]pyrans in the presence of an acid catalyst afforded novel benzopentalenonaphthalenone dyes. 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The reduction is both regio- and chemoselective. Treatment of the chroman-4-ones with MeSO3H generates the 3-alkenyl-2-arylchromones by a dehydrative rearrangement initiated by retro-Michael cleavage of the pyranone ring. This reduction–rearrangement sequence can be extended to 2-alkyl-3-alkenoylchromones to generate 3-alkenyl-2-styrylchromones, the first examples of 2,3-dialkenylchromones', 'creators_id' => 'c.gabbutt@hud.ac.uk', 'contributors_name_lineage' => undef, 'userid' => '3483', 'patent_applicant' => undef, 'monograph_type' => undef, 'datestamp_minute' => '29', 'lyricists_name_family' => undef, 'sword_slug' => undef, 'id_number' => 'doi:10.1016/j.tetlet.2005.06.058', 'volume' => '46', 'gscholar_datestamp_month' => undef, 'conductors_id' => undef, 'suggestions' => undef, 'referencetext' => undef, 'date_year' => '2005', 'status_changed_hour' => '11', 'gscholar_cluster' => undef, 'producers_name_family' => undef }, '15045' => { 'funders' => undef, 'conductors_name_family' => undef, 'num_pieces' => undef, 'department' => undef, 'contributors_id' => undef, 'gscholar_datestamp_second' => undef, 'keywords' => undef, 'lyricists_name_lineage' => undef, 'lyricists_id' => undef, 'edit_lock_since' => '1350550156', 'creatorlist' => { '4' => { 'creators_name_lineage' => '', 'creators_name_family' => 'Hursthouse', 'eprintid' => '15045', 'creators_name_honourific' => '', 'pos' => '4', 'creators_name_given' => 'Michael B', 'creators_id' => undef }, '1' => { 'creators_name_lineage' => '', 'creators_name_family' => 'Gabbutt', 'eprintid' => '15045', 'creators_name_honourific' => '', 'pos' => '1', 'creators_name_given' => 'Christopher D.', 'creators_id' => 'c.gabbutt@hud.ac.uk' }, '0' => { 'creators_name_lineage' => '', 'creators_name_family' => 'Daia', 'eprintid' => '15045', 'creators_name_honourific' => '', 'pos' => '0', 'creators_name_given' => 'Dan E', 'creators_id' => undef }, '3' => { 'creators_name_lineage' => '', 'creators_name_family' => 'Hepworth', 'eprintid' => '15045', 'creators_name_honourific' => '', 'pos' => '3', 'creators_name_given' => 'John D', 'creators_id' => undef }, '2' => { 'creators_name_lineage' => '', 'creators_name_family' => 'Heron', 'eprintid' => '15045', 'creators_name_honourific' => '', 'pos' => '2', 'creators_name_given' => 'B. Mark', 'creators_id' => 'm.heron@hud.ac.uk' }, '5' => { 'creators_name_lineage' => '', 'creators_name_family' => 'Malik', 'eprintid' => '15045', 'creators_name_honourific' => '', 'pos' => '5', 'creators_name_given' => 'K.M.Abdul', 'creators_id' => undef } }, 'exhibitors_id' => undef, 'latitude' => undef, 'replacedby' => undef, 'status_changed_month' => '9', 'editors_name_honourific' => undef, 'admin_note' => undef, 'event_title' => undef, 'date_type' => 'published', 'pres_type' => undef, 'longitude' => undef, 'creators_name_honourific' => '', 'include_in_hebci' => 'no', 'producers_name_honourific' => undef, 'scopus_citation_count' => undef, 'datestamp_year' => '2012', 'fileinfo' => '', 'status_changed_second' => '8', 'exhibitors_name_honourific' => undef, 'editors_id' => undef, 'title' => 'Conjugate additions of lithium dialkynylcuprates [(RC?C)2CuLi] to activated chromones. 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Cycloaddition with dienes gives access to the dibenzo[b,d]pyran system. 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Mark', 'creators_id' => 'm.heron@hud.ac.uk' }, '0' => { 'creators_name_lineage' => '', 'creators_name_family' => 'Gabbutt', 'eprintid' => '15079', 'creators_name_honourific' => '', 'pos' => '0', 'creators_name_given' => 'Christopher D.', 'creators_id' => 'c.gabbutt@hud.ac.uk' }, '3' => { 'creators_name_lineage' => '', 'creators_name_family' => 'Partington', 'eprintid' => '15079', 'creators_name_honourific' => '', 'pos' => '3', 'creators_name_given' => 'Steven M.', 'creators_id' => undef }, '2' => { 'creators_name_lineage' => '', 'creators_name_family' => 'Mars', 'eprintid' => '15079', 'creators_name_honourific' => '', 'pos' => '2', 'creators_name_given' => 'Craig A.', 'creators_id' => undef } }, 'exhibitors_id' => undef, 'latitude' => undef, 'replacedby' => undef, 'status_changed_month' => '9', 'editors_name_honourific' => undef, 'admin_note' => undef, 'event_title' => undef, 'date_type' => 'published', 'pres_type' => undef, 'longitude' => undef, 'creators_name_honourific' => '', 'include_in_hebci' => 'no', 'producers_name_honourific' => undef, 'scopus_citation_count' => undef, 'datestamp_year' => '2012', 'fileinfo' => '', 'status_changed_second' => '50', 'exhibitors_name_honourific' => undef, 'editors_id' => undef, 'title' => 'Synthesis and Photochromic Properties of 2H,9H-Indeno[1,2-f]- and 3H,7H-Indeno[2,1-i]- naphtho[2,1-b]pyrans', 'corp_creators' => undef, 'contributors_name_given' => undef, 'alt_title' => undef, 'contributors_name_family' => undef, 'sponsors' => undef, 'output_media' => undef, 'editors_name_lineage' => undef, 'dir' => 'disk0/00/01/50/79', 'overlay_journal_id' => undef, 'gscholar_datestamp_year' => undef, 'ispublished' => 'pub', 'item_issues_count' => '0', 'conductors_name_given' => undef, 'sword_depositor' => undef, 'full_text_status' => 'none', 'lastmod_minute' => '45', 'refereed' => 'TRUE', 'contact_email' => 'c.gabbutt@hud.ac.uk', 'copyright_holders' => undef, 'date_day' => undef, 'gscholar_impact' => undef, 'official_url' => 'http://dx.doi.org/10.1080/15421400590946334', 'succeeds' => undef, 'datestamp_month' => '9', 'commentary' => undef, 'lastmod_day' => '18', 'publisher' => 'Taylor & Francis', 'pagerange' => '167-172', 'include_in_pedagogical' => 'no', 'task_purpose' => undef, 'status_changed_year' => '2012', 'book_title' => undef, 'thesis_name' => undef, 'event_location' => undef, 'type' => 'article', 'publication' => 'Molecular Crystals and Liquid Crystals', 'lastmod_second' => '38', 'place_of_pub' => undef, 'contributors_name_honourific' => undef, 'gscholar_datestamp_day' => undef, 'issn' => '1542-1406', 'datestamp_hour' => '12', 'exhibitors_name_given' => undef, 'creators_name_family' => 'Gabbutt', 'composition_type' => undef, 'producers_id' => undef, 'datestamp_second' => '50', 'note' => undef, 'edit_lock_until' => '0', 'editor_note' => undef, 'pedagogic_type' => undef, 'date_month' => 8, 'rights' => undef, 'contributors_type' => undef, 'scopus_id' => undef, 'eprintid' => '15079', 'producers_name_given' => undef, 'thesis_type' => undef, 'projects' => undef, 'lastmod_year' => '2012', 'data_type' => undef, 'gscholar_datestamp_minute' => undef, 'editors_name_given' => undef, 'isbn' => undef, 'include_in_cv' => 'yes', 'editors_name_family' => undef, 'lastmod_month' => '10', 'event_dates' => undef, 'fulltimestamp' => '20050800', 'learning_level' => undef, 'conductors_name_lineage' => undef, 'pages' => undef, 'source' => undef, 'lastmod_hour' => '8', 'number' => '1', 'rev_number' => '11', 'edit_lock_user' => '3483', 'series' => undef, 'creators_name_lineage' => '', 'pos' => '1', 'metadata_visibility' => 'show', 'eprint_status' => 'archive', 'creators_name_given' => 'Christopher D.', 'exhibitors_name_lineage' => undef, 'divisions' => 'sas', 'institution' => undef, 'subjects' => 'QD', 'gscholar_datestamp_hour' => undef, 'producers_name_lineage' => undef, 'lyricists_name_given' => undef, 'completion_time' => undef, 'status_changed_minute' => '35', 'conductors_name_honourific' => undef, 'exhibitors_name_family' => undef, 'lyricists_name_honourific' => undef, 'event_type' => undef, 'importid' => undef, 'status_changed_day' => '25', 'datestamp_day' => '25', 'abstract' => 'Expedient syntheses of the 3-hydroxy- and 6-hydroxy- derivatives of 11H-benzo[a]fluoren-11-one, obtained via Suzuki-Miyaura couplings are described. Reactions of these phenols with 1,1-diarylprop-2-yn-1-ols give indeno[2,1-i]- and indeno[1,2-f]- naphtho[2,1-b]pyranones respectively. The photochromic properties of these and the reduced derivatives are reported. A rationale for the pronounced hypsochromic shift in ?max of the photomerocyanine from a 2H,9H-indeno[1,2-f]naphtho[2,1-b]pyran is presented.', 'creators_id' => 'c.gabbutt@hud.ac.uk', 'contributors_name_lineage' => undef, 'userid' => '3483', 'patent_applicant' => undef, 'monograph_type' => undef, 'datestamp_minute' => '35', 'lyricists_name_family' => undef, 'sword_slug' => undef, 'id_number' => 'doi:10.1080/15421400590946334', 'volume' => '430', 'gscholar_datestamp_month' => undef, 'conductors_id' => undef, 'suggestions' => undef, 'referencetext' => undef, 'date_year' => '2005', 'status_changed_hour' => '12', 'gscholar_cluster' => undef, 'producers_name_family' => undef }, '15643' => { 'funders' => undef, 'conductors_name_family' => undef, 'num_pieces' => undef, 'department' => undef, 'contributors_id' => undef, 'gscholar_datestamp_second' => undef, 'keywords' => undef, 'lyricists_name_lineage' => undef, 'lyricists_id' => undef, 'edit_lock_since' => '1350653004', 'creatorlist' => { '1' => { 'creators_name_lineage' => '', 'creators_name_family' => 'Heron', 'eprintid' => '15643', 'creators_name_honourific' => '', 'pos' => '1', 'creators_name_given' => 'B. Mark', 'creators_id' => 'm.heron@hud.ac.uk' }, '4' => { 'creators_name_lineage' => '', 'creators_name_family' => 'Partington', 'eprintid' => '15643', 'creators_name_honourific' => '', 'pos' => '4', 'creators_name_given' => 'Steven M.', 'creators_id' => undef }, '0' => { 'creators_name_lineage' => '', 'creators_name_family' => 'Clarke ', 'eprintid' => '15643', 'creators_name_honourific' => '', 'pos' => '0', 'creators_name_given' => 'David A.', 'creators_id' => undef }, '3' => { 'creators_name_lineage' => '', 'creators_name_family' => 'Hepworth', 'eprintid' => '15643', 'creators_name_honourific' => '', 'pos' => '3', 'creators_name_given' => 'John D.', 'creators_id' => undef }, '2' => { 'creators_name_lineage' => '', 'creators_name_family' => 'Gabbutt', 'eprintid' => '15643', 'creators_name_honourific' => '', 'pos' => '2', 'creators_name_given' => 'Christopher D.', 'creators_id' => 'c.gabbutt@hud.ac.uk' }, '5' => { 'creators_name_lineage' => '', 'creators_name_family' => 'Corns', 'eprintid' => '15643', 'creators_name_honourific' => '', 'pos' => '5', 'creators_name_given' => 'Stephen N.', 'creators_id' => undef } }, 'exhibitors_id' => undef, 'latitude' => undef, 'replacedby' => undef, 'status_changed_month' => '10', 'editors_name_honourific' => undef, 'admin_note' => undef, 'event_title' => undef, 'date_type' => 'published', 'pres_type' => undef, 'longitude' => undef, 'creators_name_honourific' => '', 'include_in_hebci' => 'no', 'producers_name_honourific' => undef, 'scopus_citation_count' => undef, 'datestamp_year' => '2012', 'fileinfo' => '', 'status_changed_second' => '21', 'exhibitors_name_honourific' => undef, 'editors_id' => undef, 'title' => 'Neutral Colouring Photochromic 2H-Naphtho[1,2-b]pyrans and Heterocyclic Pyrans and Their Use', 'corp_creators' => 'James Robinson Ltd', 'contributors_name_given' => undef, 'alt_title' => undef, 'contributors_name_family' => undef, 'sponsors' => undef, 'output_media' => undef, 'editors_name_lineage' => undef, 'dir' => 'disk0/00/01/56/43', 'overlay_journal_id' => undef, 'gscholar_datestamp_year' => undef, 'ispublished' => 'pub', 'item_issues_count' => '0', 'conductors_name_given' => undef, 'sword_depositor' => undef, 'full_text_status' => 'none', 'lastmod_minute' => '23', 'refereed' => undef, 'contact_email' => undef, 'copyright_holders' => undef, 'date_day' => undef, 'gscholar_impact' => undef, 'official_url' => undef, 'succeeds' => undef, 'datestamp_month' => '10', 'commentary' => undef, 'lastmod_day' => '19', 'publisher' => undef, 'pagerange' => undef, 'include_in_pedagogical' => 'no', 'task_purpose' => undef, 'status_changed_year' => '2012', 'book_title' => undef, 'thesis_name' => undef, 'event_location' => undef, 'type' => 'patent', 'publication' => undef, 'lastmod_second' => '59', 'place_of_pub' => undef, 'contributors_name_honourific' => undef, 'gscholar_datestamp_day' => undef, 'issn' => undef, 'datestamp_hour' => '12', 'exhibitors_name_given' => undef, 'creators_name_family' => 'Gabbutt', 'composition_type' => undef, 'producers_id' => undef, 'datestamp_second' => '21', 'note' => undef, 'edit_lock_until' => '0', 'editor_note' => undef, 'pedagogic_type' => undef, 'date_month' => 10, 'rights' => undef, 'contributors_type' => undef, 'scopus_id' => undef, 'eprintid' => '15643', 'producers_name_given' => undef, 'thesis_type' => undef, 'projects' => undef, 'lastmod_year' => '2012', 'data_type' => undef, 'gscholar_datestamp_minute' => undef, 'editors_name_given' => undef, 'isbn' => undef, 'include_in_cv' => 'yes', 'editors_name_family' => undef, 'lastmod_month' => '10', 'event_dates' => undef, 'fulltimestamp' => '19981000', 'learning_level' => undef, 'conductors_name_lineage' => undef, 'pages' => undef, 'source' => undef, 'lastmod_hour' => '13', 'number' => undef, 'rev_number' => '11', 'edit_lock_user' => '3494', 'series' => undef, 'creators_name_lineage' => '', 'pos' => '0', 'metadata_visibility' => 'show', 'eprint_status' => 'archive', 'creators_name_given' => 'Christopher D.', 'exhibitors_name_lineage' => undef, 'divisions' => 'sas', 'institution' => undef, 'subjects' => 'QD', 'gscholar_datestamp_hour' => undef, 'producers_name_lineage' => undef, 'lyricists_name_given' => undef, 'completion_time' => undef, 'status_changed_minute' => '52', 'conductors_name_honourific' => undef, 'exhibitors_name_family' => undef, 'lyricists_name_honourific' => undef, 'event_type' => undef, 'importid' => undef, 'status_changed_day' => '19', 'datestamp_day' => '19', 'abstract' => 'A naphtho[1,2-$i(b)]pyran of general formula (I) wherein R?1¿ and R?2¿ are each selected from unsubstituted, mono-, di- or polysubstituted aryl groups, phenyl and naphthyl and heteroaryl groups. R?5¿ is selected from linear or branched C¿1?-C¿10? alkyl, C¿1?-C¿20? cycloalkyl, C¿1?-C¿20? bicycloalkyl, C¿1?-C¿20? polycycloalkyl, linear or branched C¿1?-C¿10? haloalkyl, linear or branched C¿1?-C¿10? perhaloalkyl, linear or branched C¿1?-C¿10? perhaloalkenyl, linear or branched C¿1?-C¿10? alkenyl, C¿1?-C¿10? alkynyl, linear or branched C¿1?-C¿10? alkoxy, linear or branched C¿1?-C¿10? alkylthio, linear or branched C¿1?-C¿10? alkoxy (linear or branched C¿1?-C¿10? alkyl), linear or branched C¿1?-C¿10? hydroxyalkyl, linear or branched C¿1?-C¿10? aminoalkyl, aryl, phenyl, heteroaryl, halogen, nitrile, nitro, amino, linear or branched C¿1?-C¿20? alkoxycarbonyl, hydroxyl, formyl, acetyl, amido, C¿1?-C¿5? alkyl amido, C¿1?-C¿5? dialkylamido, aroyl, benzoyl, alkyl C¿1?-C¿5? amino, dialkyl C¿1?-C¿5? amino, arylamino, diarylamino, aryl C¿1?-C¿5? alkylamino and cyclicamino groups, arylsulfinyl, arylsulfanyl, arylsulfonyl, linear or branched C¿1?-C¿10? alkylsulfonyl, P(O)(O-C¿1?-C¿10? alkyl)¿2? or is an alkenyl function of general formula (a) wherein R?11¿ and/or R?12¿ and/or R?13¿ is hydrogen or R?5¿, R?3¿, R?4¿, R?6¿, R?8¿ and R?10¿ are each hydrogen, R?1¿, R?2¿ or R?5¿; and R?7¿ and/or R?9¿ is hydrogen or an amino group provided that R?7¿ and R?9¿ are not both hydrogen. The compounds may be combined with a polymeric host material such as plastic or glass to make a sunglass lens, an ophthalmic lens or a window.', 'creators_id' => 'c.gabbutt@hud.ac.uk', 'contributors_name_lineage' => undef, 'userid' => '3494', 'patent_applicant' => 'James Robinson Ltd', 'monograph_type' => undef, 'datestamp_minute' => '52', 'lyricists_name_family' => undef, 'sword_slug' => undef, 'id_number' => 'WO/1998/042693', 'volume' => undef, 'gscholar_datestamp_month' => undef, 'conductors_id' => undef, 'suggestions' => undef, 'referencetext' => undef, 'date_year' => '1998', 'status_changed_hour' => '12', 'gscholar_cluster' => undef, 'producers_name_family' => undef }, '14943' => { 'funders' => undef, 'conductors_name_family' => undef, 'num_pieces' => undef, 'department' => undef, 'contributors_id' => undef, 'gscholar_datestamp_second' => undef, 'keywords' => undef, 'lyricists_name_lineage' => undef, 'lyricists_id' => undef, 'edit_lock_since' => '1350549550', 'creatorlist' => { '1' => { 'creators_name_lineage' => '', 'creators_name_family' => 'Gabbutt', 'eprintid' => '14943', 'creators_name_honourific' => '', 'pos' => '1', 'creators_name_given' => 'Christopher D.', 'creators_id' => 'c.gabbutt@hud.ac.uk' }, '0' => { 'creators_name_lineage' => '', 'creators_name_family' => 'Blackwell', 'eprintid' => '14943', 'creators_name_honourific' => '', 'pos' => '0', 'creators_name_given' => 'Catherine J.', 'creators_id' => undef }, '3' => { 'creators_name_lineage' => '', 'creators_name_family' => 'Heron', 'eprintid' => '14943', 'creators_name_honourific' => '', 'pos' => '3', 'creators_name_given' => 'B. Mark', 'creators_id' => 'm.heron@hud.ac.uk' }, '2' => { 'creators_name_lineage' => '', 'creators_name_family' => 'Guthrie', 'eprintid' => '14943', 'creators_name_honourific' => '', 'pos' => '2', 'creators_name_given' => 'James T.', 'creators_id' => undef } }, 'exhibitors_id' => undef, 'latitude' => undef, 'replacedby' => undef, 'status_changed_month' => '9', 'editors_name_honourific' => undef, 'admin_note' => undef, 'event_title' => undef, 'date_type' => 'published', 'pres_type' => undef, 'longitude' => undef, 'creators_name_honourific' => '', 'include_in_hebci' => 'no', 'producers_name_honourific' => undef, 'scopus_citation_count' => undef, 'datestamp_year' => '2012', 'fileinfo' => '', 'status_changed_second' => '15', 'exhibitors_name_honourific' => undef, 'editors_id' => undef, 'title' => 'The synthesis and properties of vinyl substituted naphthopyrans and their styrene copolymers', 'corp_creators' => undef, 'contributors_name_given' => undef, 'alt_title' => undef, 'contributors_name_family' => undef, 'sponsors' => undef, 'output_media' => undef, 'editors_name_lineage' => undef, 'dir' => 'disk0/00/01/49/43', 'overlay_journal_id' => undef, 'gscholar_datestamp_year' => undef, 'ispublished' => 'pub', 'item_issues_count' => '0', 'conductors_name_given' => undef, 'sword_depositor' => undef, 'full_text_status' => 'none', 'lastmod_minute' => '39', 'refereed' => 'TRUE', 'contact_email' => 'c.gabbutt@hud.ac.uk', 'copyright_holders' => undef, 'date_day' => undef, 'gscholar_impact' => undef, 'official_url' => 'http://dx.doi.org/10.1016/j.dyepig.2012.05.017', 'succeeds' => undef, 'datestamp_month' => '9', 'commentary' => undef, 'lastmod_day' => '18', 'publisher' => 'Pergamon', 'pagerange' => '408-420', 'include_in_pedagogical' => 'no', 'task_purpose' => undef, 'status_changed_year' => '2012', 'book_title' => undef, 'thesis_name' => undef, 'event_location' => undef, 'type' => 'article', 'publication' => 'Dyes and Pigments', 'lastmod_second' => '22', 'place_of_pub' => undef, 'contributors_name_honourific' => undef, 'gscholar_datestamp_day' => undef, 'issn' => '0143-7208', 'datestamp_hour' => '12', 'exhibitors_name_given' => undef, 'creators_name_family' => 'Gabbutt', 'composition_type' => undef, 'producers_id' => undef, 'datestamp_second' => '15', 'note' => undef, 'edit_lock_until' => '0', 'editor_note' => undef, 'pedagogic_type' => undef, 'date_month' => 11, 'rights' => undef, 'contributors_type' => undef, 'scopus_id' => undef, 'eprintid' => '14943', 'producers_name_given' => undef, 'thesis_type' => undef, 'projects' => undef, 'lastmod_year' => '2012', 'data_type' => undef, 'gscholar_datestamp_minute' => undef, 'editors_name_given' => undef, 'isbn' => undef, 'include_in_cv' => 'yes', 'editors_name_family' => undef, 'lastmod_month' => '10', 'event_dates' => undef, 'fulltimestamp' => '20121100', 'learning_level' => undef, 'conductors_name_lineage' => undef, 'pages' => undef, 'source' => undef, 'lastmod_hour' => '8', 'number' => '2', 'rev_number' => '12', 'edit_lock_user' => '3483', 'series' => undef, 'creators_name_lineage' => '', 'pos' => '0', 'metadata_visibility' => 'show', 'eprint_status' => 'archive', 'creators_name_given' => 'Christopher D.', 'exhibitors_name_lineage' => undef, 'divisions' => 'sas', 'institution' => undef, 'subjects' => 'Q1', 'gscholar_datestamp_hour' => undef, 'producers_name_lineage' => undef, 'lyricists_name_given' => undef, 'completion_time' => undef, 'status_changed_minute' => '5', 'conductors_name_honourific' => undef, 'exhibitors_name_family' => undef, 'lyricists_name_honourific' => undef, 'event_type' => undef, 'importid' => undef, 'status_changed_day' => '18', 'datestamp_day' => '18', 'abstract' => 'A comprehensive series of mono-, di- and tri-bromo-3H-naphtho[2,1-b]pyrans was synthesised by the traditional union of a 2-naphthol with an alkynol. The bromine atom(s) in these naphthopyrans was readily replaced by a vinyl group using a Suzuki coupling reaction with vinyl boronic anhydride pyridine complex. The efficiency of the Suzuki vinylation reaction decreases with the increasing number of bromine atoms to be substituted. The vinylnaphthopyrans served as styrene analogues and readily underwent a thermally initiated free radical addition co-polymerisation with styrene to efficiently afford low molecular weight poly(styrene-co-naphthopyrans). The photochromic response of the bromonaphthopyrans and vinylnaphthopyrans followed the established colour-structure relationships for photochromic naphthopyrans. The photochromic response of toluene solutions of the poly(styrene-co-naphthopyrans) was characterised by a hypsochromic shift of the ?max relative to that recorded for the vinylnaphthopyran monomers. Increased half-lives were noted for the copolymers derived from the bis- and tris-vinylnaphthopyrans where some degree of crosslinking was expected. A further hypsochromic shift in ?max resulted for the thin films of the poly(styrene-co-naphthopyrans). Of particular note was the behaviour of the 3-(2-vinylphenyl)-3-phenylnaphthopyran which gave the typical yellow colour of the photomerocyanine coupled with the predictable large half-life. However, all photochromism of this naphthopyran was lost upon polymerisation suggesting that an alternative pathway supervenes in the expected polymerisation sequence. 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Mark', 'creators_id' => 'm.heron@hud.ac.uk' } }, 'exhibitors_id' => undef, 'latitude' => undef, 'replacedby' => undef, 'status_changed_month' => '9', 'editors_name_honourific' => undef, 'admin_note' => undef, 'event_title' => undef, 'date_type' => 'published', 'pres_type' => undef, 'longitude' => undef, 'creators_name_honourific' => '', 'include_in_hebci' => 'no', 'producers_name_honourific' => undef, 'scopus_citation_count' => undef, 'datestamp_year' => '2012', 'fileinfo' => '', 'status_changed_second' => '25', 'exhibitors_name_honourific' => undef, 'editors_id' => undef, 'title' => 'Synthesis and spectroscopic properties of some merocyanine dyes', 'corp_creators' => undef, 'contributors_name_given' => undef, 'alt_title' => undef, 'contributors_name_family' => undef, 'sponsors' => undef, 'output_media' => undef, 'editors_name_lineage' => undef, 'dir' => 'disk0/00/01/50/39', 'overlay_journal_id' => undef, 'gscholar_datestamp_year' => undef, 'ispublished' => 'pub', 'item_issues_count' => '0', 'conductors_name_given' => undef, 'sword_depositor' => undef, 'full_text_status' => 'none', 'lastmod_minute' => '46', 'refereed' => 'TRUE', 'contact_email' => 'c.gabbutt@hud.ac.uk', 'copyright_holders' => undef, 'date_day' => undef, 'gscholar_impact' => undef, 'official_url' => 'http://dx.doi.org/10.1016/S0143-7208(01)00005-5', 'succeeds' => undef, 'datestamp_month' => '9', 'commentary' => undef, 'lastmod_day' => '18', 'publisher' => 'Pergamon', 'pagerange' => '65-74', 'include_in_pedagogical' => 'no', 'task_purpose' => undef, 'status_changed_year' => '2012', 'book_title' => undef, 'thesis_name' => undef, 'event_location' => undef, 'type' => 'article', 'publication' => 'Dyes and Pigments', 'lastmod_second' => '51', 'place_of_pub' => undef, 'contributors_name_honourific' => undef, 'gscholar_datestamp_day' => undef, 'issn' => '0143-7208', 'datestamp_hour' => '9', 'exhibitors_name_given' => undef, 'creators_name_family' => 'Gabbutt', 'composition_type' => undef, 'producers_id' => undef, 'datestamp_second' => '25', 'note' => undef, 'edit_lock_until' => '0', 'editor_note' => undef, 'pedagogic_type' => undef, 'date_month' => 4, 'rights' => undef, 'contributors_type' => undef, 'scopus_id' => undef, 'eprintid' => '15039', 'producers_name_given' => undef, 'thesis_type' => undef, 'projects' => undef, 'lastmod_year' => '2012', 'data_type' => undef, 'gscholar_datestamp_minute' => undef, 'editors_name_given' => undef, 'isbn' => undef, 'include_in_cv' => 'yes', 'editors_name_family' => undef, 'lastmod_month' => '10', 'event_dates' => undef, 'fulltimestamp' => '20010400', 'learning_level' => undef, 'conductors_name_lineage' => undef, 'pages' => undef, 'source' => undef, 'lastmod_hour' => '9', 'number' => '1', 'rev_number' => '12', 'edit_lock_user' => '3483', 'series' => undef, 'creators_name_lineage' => '', 'pos' => '1', 'metadata_visibility' => 'show', 'eprint_status' => 'archive', 'creators_name_given' => 'Christopher D.', 'exhibitors_name_lineage' => undef, 'divisions' => 'sas', 'institution' => undef, 'subjects' => 'QD', 'gscholar_datestamp_hour' => undef, 'producers_name_lineage' => undef, 'lyricists_name_given' => undef, 'completion_time' => undef, 'status_changed_minute' => '6', 'conductors_name_honourific' => undef, 'exhibitors_name_family' => undef, 'lyricists_name_honourific' => undef, 'event_type' => undef, 'importid' => undef, 'status_changed_day' => '25', 'datestamp_day' => '25', 'abstract' => 'The reaction between some 1,1-diarylprop-2-yn-1-ols 3 and cyclohexane-1,3-diones affords merocyanine dyes 7, the valence tautomers of the tetrahydro-2H-[1]benzopyrans. The spectroscopic properties of these dyes are discussed. The isomeric merocyanine dyes 14 and 15 derived from the reaction of 1,1-bis(4-dimethyl-aminophenyl)prop-2-yn-1-ol and 2-tetralone are dehydrogenated to the photochromic 3H-naphtho[2,1-b]pyran 12. This protocol constitutes a new route to the photochromic naphthopyran unit. 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The linked benzophenones were efficiently transformed in two steps to symmetrically linked naphthopyrans (10d–k). The photochromic response of these novel systems under steady state irradiation is characterised by a two stage fading process and their colourability is only marginally improved over the related monomeric analogues (10a–c). 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The colourless naphthopyrans exhibit photochromism through electrocyclic opening of the pyran ring. The spectral properties of the resulting coloured naphthalene-based dienones are discussed. 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Subsequent electrophilic trapping gives chromones 4 together with a ring-contracted dimer 6. During the formation of some acetals, an acid-catalysed rearrangement to a 2-substituted 3-formylchromone acetal is observed. 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Mark', 'creators_id' => 'm.heron@hud.ac.uk' } }, 'exhibitors_id' => undef, 'latitude' => undef, 'replacedby' => undef, 'status_changed_month' => '9', 'editors_name_honourific' => undef, 'admin_note' => undef, 'event_title' => undef, 'date_type' => 'published', 'pres_type' => undef, 'longitude' => undef, 'creators_name_honourific' => '', 'include_in_hebci' => 'no', 'producers_name_honourific' => undef, 'scopus_citation_count' => undef, 'datestamp_year' => '2012', 'fileinfo' => '', 'status_changed_second' => '40', 'exhibitors_name_honourific' => undef, 'editors_id' => undef, 'title' => 'Vibrational assignment of the spectral data and thermodynamic properties of 2-chloro-4-fluorobenzophenone using DFT quantum chemical calculations', 'corp_creators' => undef, 'contributors_name_given' => undef, 'alt_title' => undef, 'contributors_name_family' => undef, 'sponsors' => undef, 'output_media' => undef, 'editors_name_lineage' => undef, 'dir' => 'disk0/00/01/49/34', 'overlay_journal_id' => undef, 'gscholar_datestamp_year' => undef, 'ispublished' => 'pub', 'item_issues_count' => '0', 'conductors_name_given' => undef, 'sword_depositor' => undef, 'full_text_status' => 'none', 'lastmod_minute' => '41', 'refereed' => 'TRUE', 'contact_email' => 'm.heron@hud.ac.uk', 'copyright_holders' => undef, 'date_day' => undef, 'gscholar_impact' => undef, 'official_url' => 'http://dx.doi.org/10.1016/j.vibspec.2011.04.006', 'succeeds' => undef, 'datestamp_month' => '9', 'commentary' => undef, 'lastmod_day' => '18', 'publisher' => 'Elsevier', 'pagerange' => '35-41', 'include_in_pedagogical' => 'no', 'task_purpose' => undef, 'status_changed_year' => '2012', 'book_title' => undef, 'thesis_name' => undef, 'event_location' => undef, 'type' => 'article', 'publication' => 'Vibrational Spectroscopy', 'lastmod_second' => '0', 'place_of_pub' => undef, 'contributors_name_honourific' => undef, 'gscholar_datestamp_day' => undef, 'issn' => '0924-2031', 'datestamp_hour' => '11', 'exhibitors_name_given' => undef, 'creators_name_family' => 'Gabbutt', 'composition_type' => undef, 'producers_id' => undef, 'datestamp_second' => '40', 'note' => undef, 'edit_lock_until' => '0', 'editor_note' => undef, 'pedagogic_type' => undef, 'date_month' => 9, 'rights' => undef, 'contributors_type' => undef, 'scopus_id' => undef, 'eprintid' => '14934', 'producers_name_given' => undef, 'thesis_type' => undef, 'projects' => undef, 'lastmod_year' => '2012', 'data_type' => undef, 'gscholar_datestamp_minute' => undef, 'editors_name_given' => undef, 'isbn' => undef, 'include_in_cv' => 'yes', 'editors_name_family' => undef, 'lastmod_month' => '10', 'event_dates' => undef, 'fulltimestamp' => '20110900', 'learning_level' => undef, 'conductors_name_lineage' => undef, 'pages' => undef, 'source' => undef, 'lastmod_hour' => '8', 'number' => '1', 'rev_number' => '11', 'edit_lock_user' => '3483', 'series' => undef, 'creators_name_lineage' => '', 'pos' => '1', 'metadata_visibility' => 'show', 'eprint_status' => 'archive', 'creators_name_given' => 'Christopher D.', 'exhibitors_name_lineage' => undef, 'divisions' => 'sas', 'institution' => undef, 'subjects' => 'QD', 'gscholar_datestamp_hour' => undef, 'producers_name_lineage' => undef, 'lyricists_name_given' => undef, 'completion_time' => undef, 'status_changed_minute' => '12', 'conductors_name_honourific' => undef, 'exhibitors_name_family' => undef, 'lyricists_name_honourific' => undef, 'event_type' => undef, 'importid' => undef, 'status_changed_day' => '18', 'datestamp_day' => '18', 'abstract' => 'The FT-Raman (3500–100 cm?1) and FT-IR (4000–450 cm?1) spectra of 2-chloro-4-fluorobenzophenone were recorded in the solid phase. Density functional theory calculations with B3LYP/6-31G (d, p) basis set was used to determine the ground state molecular geometries (bond lengths and bond angles), harmonic vibrational frequencies, infrared intensities and Raman activities of this compound. Potential energy distributions (PEDs) and normal modes, for the spectral data computed at B3LYP/6-31G (d, p) level, have also been obtained from force-field calculations. The wavenumbers found after scaling of the force field showed very good agreement with the experimentally determined values. A comparison of the theoretical spectra and experimental FT-IR and FT-Raman spectra of the title molecule has been made and full vibrational assignments of the observed spectra have been proposed. On the basis of vibrational analyses, the thermodynamic properties of title compound at different temperatures have been calculated. 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R 1 , R 2 and R 4 , represent a group selected from halogen, H, -R a , aryl, -OH, -OR a , -SH, -SR a , -NH 2 , -NR a R a1 , -NR b R c , -NR a1 COR a , -NR a1 CO(aryl), -NR a1 aryl, -N-aryl 2 , -N(aryl)CO(aryl), -CO-R a , -CO 2 R a1 , -OC(O)-R d , and - X-(R e )-Y, and linear or branched (C 1 -C 18 ) perfluoroalkyl group, wherein R a , R a1 , R b , R c , X, Y, R e , R d are as defined into the description; ? Z 1 represent a group selected from: wherein R 3 , J and n are as defined into the description; ? R 5 , Z 2 , Z 3 are as defined into the description; ? 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Similar behaviour is displayed by the isomeric spiro(2H-naphtho[1,2-b]pyran-2,9?-thioxanthene-10,10-dioxide) 9 affording 9-(naphtho[1,2-b]furan-2-yl)-9H-thioxanthene-10,10-dioxide 12, though more severe reaction conditions were required. The comparative ease of this rearrangement for the isomers 3 and 9 was rationalised on the basis of the relative isomer populations of the ring-opened naphthopyrans. The rearrangement of simple mono- and bis-methylsulfonylphenyl substituted photochromic naphthopyrans 18, 20 was examined; the former failed to rearrange whereas the latter could be induced to rearrange only under prolonged UV irradiation. The photochromism of diastereoisomerically pure sulfoxides derived from the oxidation of spiro(3H-naphtho[2,1-b]pyran-3,9?-thioxanthene) 2a and spiro(2H-naphtho[1,2-b]pyran-2,9?-thioxanthene) 2b resulted in conversion to the most thermodynamically stable trans-isomer in each case. 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The naphthopyran–boradiazaindacene conjugates exhibit a weaker photochromic response relative to the simple naphthopyrans with the photomerocyanines fading relatively quickly. Photochromic switching of the naphthopyran unit results in a decrease in the fluorescence intensity for only the most persistent photomerocyanine. A crystal structure shows that the units are essentially orthogonally disposed and that the boradiazaindacene core is extensively delocalised. 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Reduction with diisobutylaluminium hydride affords a separable mixture of the cis- and trans-5-thiorotenoids. Dieckmann cyclisation of ethyl 2-(ethoxycarbonylmethylthio)phenylethanoate affords a mixture of 4-ethoxycarbonyl- and 2-ethoxycarbonyl-thiochroman-3-ones. Attempts to prepare a thiorotenoid by condensation of these ?-keto esters with 4-methoxyphenol resulted in formation of the novel bis[1]benzothiopyrano[3,2-b:4?,3?-e]pyran ring system. 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The resulting substituted methanols displayed good photochromism leading to the reversible generation of redeorange photomerocyanines. 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Mark', 'creators_id' => 'm.heron@hud.ac.uk' } }, 'exhibitors_id' => undef, 'latitude' => undef, 'replacedby' => undef, 'status_changed_month' => '9', 'editors_name_honourific' => undef, 'admin_note' => undef, 'event_title' => undef, 'date_type' => 'published', 'pres_type' => undef, 'longitude' => undef, 'creators_name_honourific' => '', 'include_in_hebci' => 'no', 'producers_name_honourific' => undef, 'scopus_citation_count' => undef, 'datestamp_year' => '2012', 'fileinfo' => '', 'status_changed_second' => '40', 'exhibitors_name_honourific' => undef, 'editors_id' => undef, 'title' => 'Ring contraction of sulfenamides derived from thiochroman-4-ones', 'corp_creators' => undef, 'contributors_name_given' => undef, 'alt_title' => undef, 'contributors_name_family' => undef, 'sponsors' => undef, 'output_media' => undef, 'editors_name_lineage' => undef, 'dir' => 'disk0/00/01/49/85', 'overlay_journal_id' => undef, 'gscholar_datestamp_year' => undef, 'ispublished' => 'pub', 'item_issues_count' => '0', 'conductors_name_given' => undef, 'sword_depositor' => undef, 'full_text_status' => 'none', 'lastmod_minute' => '55', 'refereed' => 'TRUE', 'contact_email' => 'c.gabbutt@hud.ac.uk', 'copyright_holders' => undef, 'date_day' => undef, 'gscholar_impact' => undef, 'official_url' => 'http://dx.doi.org/10.1016/S0040-4020(01)80797-3', 'succeeds' => undef, 'datestamp_month' => '9', 'commentary' => undef, 'lastmod_day' => '18', 'publisher' => 'Elsevier', 'pagerange' => '827-834', 'include_in_pedagogical' => 'no', 'task_purpose' => undef, 'status_changed_year' => '2012', 'book_title' => undef, 'thesis_name' => undef, 'event_location' => undef, 'type' => 'article', 'publication' => 'Tetrahedron', 'lastmod_second' => '27', 'place_of_pub' => undef, 'contributors_name_honourific' => undef, 'gscholar_datestamp_day' => undef, 'issn' => '0040-4020', 'datestamp_hour' => '11', 'exhibitors_name_given' => undef, 'creators_name_family' => 'Gabbutt', 'composition_type' => undef, 'producers_id' => undef, 'datestamp_second' => '40', 'note' => undef, 'edit_lock_until' => '0', 'editor_note' => undef, 'pedagogic_type' => undef, 'date_month' => 1, 'rights' => undef, 'contributors_type' => undef, 'scopus_id' => undef, 'eprintid' => '14985', 'producers_name_given' => undef, 'thesis_type' => undef, 'projects' => undef, 'lastmod_year' => '2012', 'data_type' => undef, 'gscholar_datestamp_minute' => undef, 'editors_name_given' => undef, 'isbn' => undef, 'include_in_cv' => 'yes', 'editors_name_family' => undef, 'lastmod_month' => '10', 'event_dates' => undef, 'fulltimestamp' => '19940100', 'learning_level' => undef, 'conductors_name_lineage' => undef, 'pages' => undef, 'source' => undef, 'lastmod_hour' => '9', 'number' => '3', 'rev_number' => '11', 'edit_lock_user' => '3483', 'series' => undef, 'creators_name_lineage' => '', 'pos' => '1', 'metadata_visibility' => 'show', 'eprint_status' => 'archive', 'creators_name_given' => 'Christopher D.', 'exhibitors_name_lineage' => undef, 'divisions' => 'sas', 'institution' => undef, 'subjects' => 'QD', 'gscholar_datestamp_hour' => undef, 'producers_name_lineage' => undef, 'lyricists_name_given' => undef, 'completion_time' => undef, 'status_changed_minute' => '38', 'conductors_name_honourific' => undef, 'exhibitors_name_family' => undef, 'lyricists_name_honourific' => undef, 'event_type' => undef, 'importid' => undef, 'status_changed_day' => '20', 'datestamp_day' => '20', 'abstract' => 'Tiochroman-4-ones and chroman-4-ones react with an excess of thionyl chloride to give the ?-chlorosulfenyl chlorides (2) which form sulfenamides (3) when treated with secondary amines. On hydrolysis, (3) undergo a ring contraction to give benzo[b]thiophen-3-ones (4). ', 'creators_id' => 'c.gabbutt@hud.ac.uk', 'contributors_name_lineage' => undef, 'userid' => '3483', 'patent_applicant' => undef, 'monograph_type' => undef, 'datestamp_minute' => '38', 'lyricists_name_family' => undef, 'sword_slug' => undef, 'id_number' => 'doi:10.1016/S0040-4020(01)80797-3', 'volume' => '50', 'gscholar_datestamp_month' => undef, 'conductors_id' => undef, 'suggestions' => undef, 'referencetext' => undef, 'date_year' => '1994', 'status_changed_hour' => '11', 'gscholar_cluster' => undef, 'producers_name_family' => undef }, '14926' => { 'funders' => undef, 'conductors_name_family' => undef, 'num_pieces' => undef, 'department' => undef, 'contributors_id' => undef, 'gscholar_datestamp_second' => undef, 'keywords' => undef, 'lyricists_name_lineage' => undef, 'lyricists_id' => undef, 'edit_lock_since' => '1350549794', 'creatorlist' => { '1' => { 'creators_name_lineage' => '', 'creators_name_family' => 'Heron', 'eprintid' => '14926', 'creators_name_honourific' => '', 'pos' => '1', 'creators_name_given' => 'B. Mark', 'creators_id' => 'm.heron@hud.ac.uk' }, '0' => { 'creators_name_lineage' => '', 'creators_name_family' => 'Gabbutt', 'eprintid' => '14926', 'creators_name_honourific' => '', 'pos' => '0', 'creators_name_given' => 'Christopher D.', 'creators_id' => 'c.gabbutt@hud.ac.uk' }, '3' => { 'creators_name_lineage' => '', 'creators_name_family' => 'Mcgivern', 'eprintid' => '14926', 'creators_name_honourific' => '', 'pos' => '3', 'creators_name_given' => 'Matthew', 'creators_id' => undef }, '2' => { 'creators_name_lineage' => '', 'creators_name_family' => 'Kolla', 'eprintid' => '14926', 'creators_name_honourific' => '', 'pos' => '2', 'creators_name_given' => 'Suresh B.', 'creators_id' => undef } }, 'exhibitors_id' => undef, 'latitude' => undef, 'replacedby' => undef, 'status_changed_month' => '9', 'editors_name_honourific' => undef, 'admin_note' => undef, 'event_title' => undef, 'date_type' => 'published', 'pres_type' => undef, 'longitude' => undef, 'creators_name_honourific' => '', 'include_in_hebci' => 'no', 'producers_name_honourific' => undef, 'scopus_citation_count' => undef, 'datestamp_year' => '2012', 'fileinfo' => '', 'status_changed_second' => '51', 'exhibitors_name_honourific' => undef, 'editors_id' => undef, 'title' => 'Two Stage Colour Modulation of Triarylmethine Dyes Derived from a Photochromic Naphthopyran', 'corp_creators' => undef, 'contributors_name_given' => undef, 'alt_title' => undef, 'contributors_name_family' => undef, 'sponsors' => undef, 'output_media' => undef, 'editors_name_lineage' => undef, 'dir' => 'disk0/00/01/49/26', 'overlay_journal_id' => undef, 'gscholar_datestamp_year' => undef, 'ispublished' => 'pub', 'item_issues_count' => '0', 'conductors_name_given' => undef, 'sword_depositor' => undef, 'full_text_status' => 'none', 'lastmod_minute' => '43', 'refereed' => 'TRUE', 'contact_email' => 'c.gabbutt@hud.ac.uk', 'copyright_holders' => undef, 'date_day' => undef, 'gscholar_impact' => undef, 'official_url' => 'http://dx.doi.org/10.1002/ejoc.200800178', 'succeeds' => undef, 'datestamp_month' => '9', 'commentary' => undef, 'lastmod_day' => '18', 'publisher' => 'Wiley', 'pagerange' => '2031-2034', 'include_in_pedagogical' => 'no', 'task_purpose' => undef, 'status_changed_year' => '2012', 'book_title' => undef, 'thesis_name' => undef, 'event_location' => undef, 'type' => 'article', 'publication' => 'European Journal of Organic Chemistry', 'lastmod_second' => '24', 'place_of_pub' => undef, 'contributors_name_honourific' => undef, 'gscholar_datestamp_day' => undef, 'issn' => '1434-193X', 'datestamp_hour' => '10', 'exhibitors_name_given' => undef, 'creators_name_family' => 'Gabbutt', 'composition_type' => undef, 'producers_id' => undef, 'datestamp_second' => '51', 'note' => undef, 'edit_lock_until' => '0', 'editor_note' => undef, 'pedagogic_type' => undef, 'date_month' => 4, 'rights' => undef, 'contributors_type' => undef, 'scopus_id' => undef, 'eprintid' => '14926', 'producers_name_given' => undef, 'thesis_type' => undef, 'projects' => undef, 'lastmod_year' => '2012', 'data_type' => undef, 'gscholar_datestamp_minute' => undef, 'editors_name_given' => undef, 'isbn' => undef, 'include_in_cv' => 'yes', 'editors_name_family' => undef, 'lastmod_month' => '10', 'event_dates' => undef, 'fulltimestamp' => '20080400', 'learning_level' => undef, 'conductors_name_lineage' => undef, 'pages' => undef, 'source' => undef, 'lastmod_hour' => '8', 'number' => '12', 'rev_number' => '11', 'edit_lock_user' => '3483', 'series' => undef, 'creators_name_lineage' => '', 'pos' => '0', 'metadata_visibility' => 'show', 'eprint_status' => 'archive', 'creators_name_given' => 'Christopher D.', 'exhibitors_name_lineage' => undef, 'divisions' => 'sas', 'institution' => undef, 'subjects' => 'Q1', 'gscholar_datestamp_hour' => undef, 'producers_name_lineage' => undef, 'lyricists_name_given' => undef, 'completion_time' => undef, 'status_changed_minute' => '20', 'conductors_name_honourific' => undef, 'exhibitors_name_family' => undef, 'lyricists_name_honourific' => undef, 'event_type' => undef, 'importid' => undef, 'status_changed_day' => '18', 'datestamp_day' => '18', 'abstract' => 'The synthesis of the unsymmetrical triarylmethine dyes 4derived from a lithiated naphthopyran and diaryl ketones is reported. In toluene solution 4 display a typical reversible photochromic response becoming coloured upon irradiation with UV light and fading upon cessation of irradiation. At low pH an intensely coloured dye cation is generated and UV irradiation of this solution results in a further colour change as a consequence of photochromic cycling of the naphthopyran unit', 'creators_id' => 'c.gabbutt@hud.ac.uk', 'contributors_name_lineage' => undef, 'userid' => '3483', 'patent_applicant' => undef, 'monograph_type' => undef, 'datestamp_minute' => '20', 'lyricists_name_family' => undef, 'sword_slug' => undef, 'id_number' => 'doi:10.1002/ejoc.200800178', 'volume' => '2008', 'gscholar_datestamp_month' => undef, 'conductors_id' => undef, 'suggestions' => undef, 'referencetext' => undef, 'date_year' => '2008', 'status_changed_hour' => '10', 'gscholar_cluster' => undef, 'producers_name_family' => undef }, '15110' => { 'funders' => undef, 'conductors_name_family' => undef, 'num_pieces' => undef, 'department' => undef, 'contributors_id' => undef, 'gscholar_datestamp_second' => undef, 'keywords' => undef, 'lyricists_name_lineage' => undef, 'lyricists_id' => undef, 'edit_lock_since' => '1350549835', 'creatorlist' => { '1' => { 'creators_name_lineage' => '', 'creators_name_family' => 'Néel', 'eprintid' => '15110', 'creators_name_honourific' => '', 'pos' => '1', 'creators_name_given' => 'Marjorie', 'creators_id' => undef }, '4' => { 'creators_name_lineage' => '', 'creators_name_family' => 'Perrier', 'eprintid' => '15110', 'creators_name_honourific' => '', 'pos' => '4', 'creators_name_given' => 'Sébastien', 'creators_id' => undef }, '0' => { 'creators_name_lineage' => '', 'creators_name_family' => 'Sriprom', 'eprintid' => '15110', 'creators_name_honourific' => '', 'pos' => '0', 'creators_name_given' => 'Wilasinee', 'creators_id' => undef }, '3' => { 'creators_name_lineage' => '', 'creators_name_family' => 'Heron', 'eprintid' => '15110', 'creators_name_honourific' => '', 'pos' => '3', 'creators_name_given' => 'B. Mark', 'creators_id' => 'm.heron@hud.ac.uk' }, '2' => { 'creators_name_lineage' => '', 'creators_name_family' => 'Gabbutt', 'eprintid' => '15110', 'creators_name_honourific' => '', 'pos' => '2', 'creators_name_given' => 'Christopher D.', 'creators_id' => 'c.gabbutt@hud.ac.uk' } }, 'exhibitors_id' => undef, 'latitude' => undef, 'replacedby' => undef, 'status_changed_month' => '9', 'editors_name_honourific' => undef, 'admin_note' => undef, 'event_title' => undef, 'date_type' => 'published', 'pres_type' => undef, 'longitude' => undef, 'creators_name_honourific' => '', 'include_in_hebci' => 'no', 'producers_name_honourific' => undef, 'scopus_citation_count' => undef, 'datestamp_year' => '2012', 'fileinfo' => '', 'status_changed_second' => '4', 'exhibitors_name_honourific' => undef, 'editors_id' => undef, 'title' => 'Tuning the color switching of naphthopyrans via the control of polymeric architectures', 'corp_creators' => undef, 'contributors_name_given' => undef, 'alt_title' => undef, 'contributors_name_family' => undef, 'sponsors' => undef, 'output_media' => undef, 'editors_name_lineage' => undef, 'dir' => 'disk0/00/01/51/10', 'overlay_journal_id' => undef, 'gscholar_datestamp_year' => undef, 'ispublished' => 'pub', 'item_issues_count' => '0', 'conductors_name_given' => undef, 'sword_depositor' => undef, 'full_text_status' => 'none', 'lastmod_minute' => '44', 'refereed' => 'TRUE', 'contact_email' => 'c.gabbutt@hud.ac.uk', 'copyright_holders' => undef, 'date_day' => undef, 'gscholar_impact' => undef, 'official_url' => 'http://dx.doi.org/10.1039/B617865K', 'succeeds' => undef, 'datestamp_month' => '9', 'commentary' => undef, 'lastmod_day' => '18', 'publisher' => 'RSC', 'pagerange' => '1885-1893', 'include_in_pedagogical' => 'no', 'task_purpose' => undef, 'status_changed_year' => '2012', 'book_title' => undef, 'thesis_name' => undef, 'event_location' => undef, 'type' => 'article', 'publication' => 'Journal of Materials Chemistry', 'lastmod_second' => '7', 'place_of_pub' => undef, 'contributors_name_honourific' => undef, 'gscholar_datestamp_day' => undef, 'issn' => '0959-9428', 'datestamp_hour' => '7', 'exhibitors_name_given' => undef, 'creators_name_family' => 'Gabbutt', 'composition_type' => undef, 'producers_id' => undef, 'datestamp_second' => '4', 'note' => undef, 'edit_lock_until' => '0', 'editor_note' => undef, 'pedagogic_type' => undef, 'date_month' => 4, 'rights' => undef, 'contributors_type' => undef, 'scopus_id' => undef, 'eprintid' => '15110', 'producers_name_given' => undef, 'thesis_type' => undef, 'projects' => undef, 'lastmod_year' => '2012', 'data_type' => undef, 'gscholar_datestamp_minute' => undef, 'editors_name_given' => undef, 'isbn' => undef, 'include_in_cv' => 'yes', 'editors_name_family' => undef, 'lastmod_month' => '10', 'event_dates' => undef, 'fulltimestamp' => '20070400', 'learning_level' => undef, 'conductors_name_lineage' => undef, 'pages' => undef, 'source' => undef, 'lastmod_hour' => '8', 'number' => '19', 'rev_number' => '11', 'edit_lock_user' => '3483', 'series' => undef, 'creators_name_lineage' => '', 'pos' => '0', 'metadata_visibility' => 'show', 'eprint_status' => 'archive', 'creators_name_given' => 'Christopher D.', 'exhibitors_name_lineage' => undef, 'divisions' => 'sas', 'institution' => undef, 'subjects' => 'Q1', 'gscholar_datestamp_hour' => undef, 'producers_name_lineage' => undef, 'lyricists_name_given' => undef, 'completion_time' => undef, 'status_changed_minute' => '34', 'conductors_name_honourific' => undef, 'exhibitors_name_family' => undef, 'lyricists_name_honourific' => undef, 'event_type' => undef, 'importid' => undef, 'status_changed_day' => '26', 'datestamp_day' => '26', 'abstract' => 'A range of polymerisable photochromic naphthopyrans were prepared via the synthesis of an acrylate moiety on either the naphthalene ring (R) and/or the di-aryl (Ar) rings on the 3-position of the naphthopyran. The monomers obtained (NA) were copolymerised with methyl methacrylate (MMA) and methyl acrylate (MA) by the RAFT (reversible addition fragmentation chain transfer) process in order to control the structure of the polymeric chains and accurately control the number of photochromic molecules per chain. Films were prepared with the synthesized photochromic polymers and their photochromic properties were assessed. We found that the fading rate of the photochromic dye was slower in a matrix of PMMA (higher Tg) than in a matrix of PMA (lower Tg). By producing block copolymers of PMMA-b-poly(MA-co-NA), the fading rate was increased, and the production of PS-b-poly(MA-co-NA) further enhanced the speed of switching, as phase separation occurred between the poly(MA-co-NA) block and the PS block. This study presents an example of tuning the photochromic properties of a dye via variation of the architecture of its polymeric support. ', 'creators_id' => 'c.gabbutt@hud.ac.uk', 'contributors_name_lineage' => undef, 'userid' => '3483', 'patent_applicant' => undef, 'monograph_type' => undef, 'datestamp_minute' => '34', 'lyricists_name_family' => undef, 'sword_slug' => undef, 'id_number' => 'doi:10.1039/B617865K', 'volume' => '17', 'gscholar_datestamp_month' => undef, 'conductors_id' => undef, 'suggestions' => undef, 'referencetext' => undef, 'date_year' => '2007', 'status_changed_hour' => '7', 'gscholar_cluster' => undef, 'producers_name_family' => undef }, '14942' => { 'funders' => undef, 'conductors_name_family' => undef, 'num_pieces' => undef, 'department' => undef, 'contributors_id' => undef, 'gscholar_datestamp_second' => undef, 'keywords' => undef, 'lyricists_name_lineage' => undef, 'lyricists_id' => undef, 'edit_lock_since' => '1350549569', 'creatorlist' => { '4' => { 'creators_name_lineage' => '', 'creators_name_family' => 'Mogstad', 'eprintid' => '14942', 'creators_name_honourific' => '', 'pos' => '4', 'creators_name_given' => 'Martin', 'creators_id' => undef }, '1' => { 'creators_name_lineage' => '', 'creators_name_family' => 'Gabbutt', 'eprintid' => '14942', 'creators_name_honourific' => '', 'pos' => '1', 'creators_name_given' => 'Christopher D.', 'creators_id' => 'c.gabbutt@hud.ac.uk' }, '0' => { 'creators_name_lineage' => '', 'creators_name_family' => 'Crossley', 'eprintid' => '14942', 'creators_name_honourific' => '', 'pos' => '0', 'creators_name_given' => 'Daniel L.', 'creators_id' => undef }, '3' => { 'creators_name_lineage' => '', 'creators_name_family' => 'Kay', 'eprintid' => '14942', 'creators_name_honourific' => '', 'pos' => '3', 'creators_name_given' => 'Paul', 'creators_id' => undef }, '2' => { 'creators_name_lineage' => '', 'creators_name_family' => 'Heron', 'eprintid' => '14942', 'creators_name_honourific' => '', 'pos' => '2', 'creators_name_given' => 'B. Mark', 'creators_id' => 'm.heron@hud.ac.uk' } }, 'exhibitors_id' => undef, 'latitude' => undef, 'replacedby' => undef, 'status_changed_month' => '9', 'editors_name_honourific' => undef, 'admin_note' => undef, 'event_title' => undef, 'date_type' => 'published', 'pres_type' => undef, 'longitude' => undef, 'creators_name_honourific' => '', 'include_in_hebci' => 'no', 'producers_name_honourific' => undef, 'scopus_citation_count' => undef, 'datestamp_year' => '2012', 'fileinfo' => '', 'status_changed_second' => '14', 'exhibitors_name_honourific' => undef, 'editors_id' => undef, 'title' => 'Synthesis and photochromic properties of spiro[naphthopyran-7?H-benzocyclohepta-5?,8?-dienes] ', 'corp_creators' => undef, 'contributors_name_given' => undef, 'alt_title' => undef, 'contributors_name_family' => undef, 'sponsors' => undef, 'output_media' => undef, 'editors_name_lineage' => undef, 'dir' => 'disk0/00/01/49/42', 'overlay_journal_id' => undef, 'gscholar_datestamp_year' => undef, 'ispublished' => 'pub', 'item_issues_count' => '0', 'conductors_name_given' => undef, 'sword_depositor' => undef, 'full_text_status' => 'none', 'lastmod_minute' => '39', 'refereed' => 'TRUE', 'contact_email' => 'c.gabbutt@hud.ac.uk', 'copyright_holders' => undef, 'date_day' => undef, 'gscholar_impact' => undef, 'official_url' => 'http://www.sciencedirect.com/science/article/pii/S0143720812000873', 'succeeds' => undef, 'datestamp_month' => '9', 'commentary' => undef, 'lastmod_day' => '18', 'publisher' => 'Pergamon', 'pagerange' => '62-68', 'include_in_pedagogical' => 'no', 'task_purpose' => undef, 'status_changed_year' => '2012', 'book_title' => undef, 'thesis_name' => undef, 'event_location' => undef, 'type' => 'article', 'publication' => 'Dyes and Pigments', 'lastmod_second' => '42', 'place_of_pub' => undef, 'contributors_name_honourific' => undef, 'gscholar_datestamp_day' => undef, 'issn' => '0143-7208', 'datestamp_hour' => '12', 'exhibitors_name_given' => undef, 'creators_name_family' => 'Gabbutt', 'composition_type' => undef, 'producers_id' => undef, 'datestamp_second' => '14', 'note' => undef, 'edit_lock_until' => '0', 'editor_note' => undef, 'pedagogic_type' => undef, 'date_month' => 10, 'rights' => undef, 'contributors_type' => undef, 'scopus_id' => undef, 'eprintid' => '14942', 'producers_name_given' => undef, 'thesis_type' => undef, 'projects' => undef, 'lastmod_year' => '2012', 'data_type' => undef, 'gscholar_datestamp_minute' => undef, 'editors_name_given' => undef, 'isbn' => undef, 'include_in_cv' => 'yes', 'editors_name_family' => undef, 'lastmod_month' => '10', 'event_dates' => undef, 'fulltimestamp' => '20121000', 'learning_level' => undef, 'conductors_name_lineage' => undef, 'pages' => undef, 'source' => undef, 'lastmod_hour' => '8', 'number' => '1', 'rev_number' => '11', 'edit_lock_user' => '3483', 'series' => undef, 'creators_name_lineage' => '', 'pos' => '0', 'metadata_visibility' => 'show', 'eprint_status' => 'archive', 'creators_name_given' => 'Christopher D.', 'exhibitors_name_lineage' => undef, 'divisions' => 'sas', 'institution' => undef, 'subjects' => 'Q1', 'gscholar_datestamp_hour' => undef, 'producers_name_lineage' => undef, 'lyricists_name_given' => undef, 'completion_time' => undef, 'status_changed_minute' => '2', 'conductors_name_honourific' => undef, 'exhibitors_name_family' => undef, 'lyricists_name_honourific' => undef, 'event_type' => undef, 'importid' => undef, 'status_changed_day' => '18', 'datestamp_day' => '18', 'abstract' => 'A series of spironaphthopyrans has been synthesised by the acid-catalysed condensation between either a substituted 1-naphthol or 2-naphthol and the propargylic alcohol derived from the addition of lithium trimethylsilylacetylide to a 7H-benzocycloheptan-7-one with subsequent in situ silyl group removal. The photochromism of the novel spironaphthopyrans was characterised by a bathochromically shifted ?max coupled with a relatively quick initial fade of the photogenerated species relative to the comparable diphenyl substituted model compounds. After initial fading a relatively intense residual colour persisted for the spironaphthopyrans. 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alkyl, linear or branched C¿2?-C¿20? alkenyl or polyalkenyl, C¿2?-C¿20? alkynyl or polyalkynyl, aryl, heteroaryl, linear or branched C¿1?-C¿20? alkyl aryl, linear or branched C¿1?-C¿20? alkyl-cycloalkyl or -bicycloalkyl or -tricycloalkyl or substituted -cycloalkyl or -bicycloalkyl or -tricycloalkyl, linear or branched C¿1?-C¿20? haloalkyl or perhaloalkyl, linear or branched C¿1?-C¿20? alkoxyalkyl or peralkoxyalkyl, linear or branched C¿1?-C¿20? alkylthioalkyl or peralkylthioalkyl, linear or branched C¿1?-C¿20? amino alkyl or peraminoalkyl, C¿3?-C¿20? cycloalkyl or substituted cycloalkyl, C¿4?-C¿20? bicycloalkyl or substituted bicycloalkyl, C¿6?-C¿20? tricycloalkyl or substituted tricycloalkyl or linear or branched C¿1?-C¿20? hydroxyalkyl or perhydroxyalkyl; R?4¿ and R?5¿ which may be the same or different are R?3¿ or R?4¿ and R?5¿ are conjoined to form a spiro linked C¿3?-C¿20? cyclic system or substituted cyclic system; and wherein R?2¿ and R?6¿ are each selected from R?3¿ or hydrogen, halogen, nitro, nitroso, amino, acetamido, C¿2?-C¿10? $i(N)-alkylamido, alkoxycarbonyl, nitrile, carboxy, hydroxy, aryloxy, C¿1?-C¿10? alkoxy, a heteroatom which is O or N or S or P which in turn can be bonded either singly or multiply to carbon, oxygen, sulphur or nitrogen, C¿1?-C¿5? alkoxy or alkylthio or aryl or aryloxy or multiples thereof. 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In some instances, significant quantities of the phosphonic acids (3) are isolated. Conversion of the bromo compounds to the lithio derivatives provides access to a wide range of novel 4-substituted 2H-chromenes and 2H-thiochromenes. 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With 2-methyl-1-naphthol, formation of the photochrome is suppressed; the only products are merocyanines 7c,d. The cyclocondensation of 2-naphthol with 5a,b proceeds much more efficiently, to give the naphtho[2,1-b]pyrans 14a,b. Pyran formation is not suppressed from either 1-bromo- or 1-(4-methoxyphenyl)-2-naphthol; reaction with 5a,b merely results in expulsion of the C-1 substituent. An alternative pathway supervenes in the reaction of 1-methyl-2-naphthol with 5a to give the benz[e]indanone 17, the constitution of which was determined by X-ray crystallography. Reaction of the 1,3,3-triarylpropynols 19a,b with 1-naphthol affords the naphthopyrans 20 together with merocyanines 21, whilst the isomeric pyrans 23 are efficiently produced from 2-naphthol. The configuration of merocyanines 7a and 21a was unequivocally established by X-ray crystallography. 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alkyl, C¿1?-C¿20? cycloalkyl, C¿1?-C¿20? bicycloalkyl, C¿1?-C¿20? polycycloalkyl, linear or branched C¿1?-C¿10? haloalkyl, linear or branched C¿1?-C¿10? perhaloalkyl, linear or branched C¿1?-C¿10? perhaloalkenyl, linear or branched C¿1?-C¿10? alkenyl, C¿1?-C¿10? alkynyl, linear or branched C¿1?-C¿10? alkoxy, linear or branched C¿1?-C¿10? alkylthio, linear or branched C¿1?-C¿10? alkoxy (linear or branched C¿1?-C¿10? alkyl), linear or branched C¿1?-C¿10? hydroxyalkyl, linear or branched C¿1?-C¿10? aminoalkyl, aryl, phenyl, heteroaryl, halogen, nitrile, nitro, amino, linear or branched C¿1?-C¿20? alkoxycarbonyl, hydroxyl, formyl, acetyl, amido, C¿1?-C¿5? alkylamido, C¿1?-C¿5? dialkylamido, aroyl, benzoyl, alkyl C¿1?-C¿5? amino, dialkyl C¿1?-C¿5? amino, arylamino, diarylamino, aryl C¿1?-C¿5? alkylamino and cyclicamino groups; arylsulfinyl, arylsulfanyl, arylsulfonyl, linear or branched C¿1?-C¿10? alkylsulfonyl, P(O)(O-C¿1?-C¿10? alkyl)¿2? or is the alkenyl function (II), wherein R?11¿ and/or R?12¿ and/or R?13¿ is hydrogen or is as defined for R?5¿, and R?3¿, R?4¿ and R?6¿-R?10¿ are each hydrogen or as defined R?1¿, R?2¿ or R?5¿. The compounds may be combined with a polymeric host material such as a plastic or a glass to make a sunglass lens, an ophthalmic lens or a window.', 'creators_id' => 'c.gabbutt@hud.ac.uk', 'contributors_name_lineage' => undef, 'userid' => '3494', 'patent_applicant' => 'James Robinson Ltd', 'monograph_type' => undef, 'datestamp_minute' => '23', 'lyricists_name_family' => undef, 'sword_slug' => undef, 'id_number' => 'WO/1998/042695 ', 'volume' => undef, 'gscholar_datestamp_month' => undef, 'conductors_id' => undef, 'suggestions' => undef, 'referencetext' => undef, 'date_year' => '1998', 'status_changed_hour' => '13', 'gscholar_cluster' => undef, 'producers_name_family' => undef }, '15035' => { 'funders' => undef, 'conductors_name_family' => undef, 'num_pieces' => undef, 'department' => undef, 'contributors_id' => undef, 'gscholar_datestamp_second' => undef, 'keywords' => undef, 'lyricists_name_lineage' => undef, 'lyricists_id' => undef, 'edit_lock_since' => '1350553692', 'creatorlist' => { '1' => { 'creators_name_lineage' => '', 'creators_name_family' => 'Hepworth', 'eprintid' => '15035', 'creators_name_honourific' => '', 'pos' => '1', 'creators_name_given' => 'John D.', 'creators_id' => undef }, '0' => { 'creators_name_lineage' => '', 'creators_name_family' => 'Gabbutt', 'eprintid' => '15035', 'creators_name_honourific' => '', 'pos' => '0', 'creators_name_given' => 'Christopher D.', 'creators_id' => 'c.gabbutt@hud.ac.uk' }, '3' => { 'creators_name_lineage' => '', 'creators_name_family' => 'Partington', 'eprintid' => '15035', 'creators_name_honourific' => '', 'pos' => '3', 'creators_name_given' => 'Steven M.', 'creators_id' => undef }, '2' => { 'creators_name_lineage' => '', 'creators_name_family' => 'Heron', 'eprintid' => '15035', 'creators_name_honourific' => '', 'pos' => '2', 'creators_name_given' => 'B. 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Section A. 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The influence of the methoxy group on the wavelength of maximum absorption and the stability of the ring-opened naphthopyrans is discussed. ', 'creators_id' => 'c.gabbutt@hud.ac.uk', 'contributors_name_lineage' => undef, 'userid' => '3483', 'patent_applicant' => undef, 'monograph_type' => undef, 'datestamp_minute' => '15', 'lyricists_name_family' => undef, 'sword_slug' => undef, 'id_number' => 'doi:10.3987/COM-03-9956', 'volume' => '63', 'gscholar_datestamp_month' => undef, 'conductors_id' => undef, 'suggestions' => undef, 'referencetext' => undef, 'date_year' => '2004', 'status_changed_hour' => '11', 'gscholar_cluster' => undef, 'producers_name_family' => undef } };

2014

Aiken, S., Booth, K., Gabbutt, C., Heron, B., Rice, C., Charaf-Eddin, A. and Jacquemin, D. (2014) ‘The first structural and spectroscopic characterisation of a ring-opened form of a 2H-naphtho[1,2-b]pyran: a novel photomerocyanineChemical Communications , 50 (58), pp. 7900-7903. ISSN 1359-7345

2013

Aiken, S., Gabbutt, C., Gillie, L., Heywood, J., Jacquemin, D., Rice, C. and Heron, B. (2013) ‘The Remarkable Hyperchromicity of Ketohydrazone Dyes and Pigment Lakes Derived from 4-Morpholino-2-naphtholEuropean Journal of Organic Chemistry , 2013 (36), pp. 8097-8107. ISSN 1434-193X

Chaitanya, K., Hai Ju, X., Heron, B. and Gabbutt, C. (2013) ‘Vibrational spectra and static vibrational contribution to first hyperpolarizability of naphthopyrans — A combined experimental and DFT study.Vibrational Spectroscopy , 69, pp. 65-83. ISSN 09242031

Aiken, S., Clayton, D., Gabbutt, C., Heron, B. and Kolla, S. (2013) ‘Cationic merocyanine dyes by photomodulation of [4-(naphthopyran-3-yl)phenyl]methinesDyes and Pigments , 97 (1), pp. 118-123. ISSN 0143-7208

2012

Blackwell, C., Gabbutt, C., Guthrie, J. and Heron, B. (2012) ‘The synthesis and properties of vinyl substituted naphthopyrans and their styrene copolymersDyes and Pigments , 95 (2), pp. 408-420. ISSN 0143-7208

Crossley, D., Gabbutt, C., Heron, B., Kay, P. and Mogstad, M. (2012) ‘Synthesis and photochromic properties of spiro[naphthopyran-7?H-benzocyclohepta-5?,8?-dienes] Dyes and Pigments , 95 (1), pp. 62-68. ISSN 0143-7208

Gabbutt, C., Heron, B., Kilner, C. and Kolla, S. (2012) ‘The synthesis and properties of naphthopyran– boradiazaindacene conjugates Dyes and Pigments , 94 (2), pp. 175-182. ISSN 0143-7208

Gabbutt, C., Gibbons, L., Heron, B. and Kolla, S. (2012) ‘The intramolecular capture of thermally generated merocyanine dyes derived from naphthopyrans: Photochromism of 5-(diarylhydroxymethyl)-2H-naphtho[1,2-b]pyrans Dyes and Pigments , 92 (3), pp. 995-1004. ISSN 0143-7208

Gabbutt, C., Heron, B., Kilner, C. and Kolla, S. (2012) ‘The synthesis and photochromism of a 2,2-diaryl-6-styryl-2H-[1]benzopyran: Unexpected palladium-mediated ring-contraction of a 6-bromo-2,2-diaryl-2H-[1]benzopyranDyes and Pigments , 92 (2), pp. 825-830. ISSN 0143-7208

2011

Gabbutt, C., Heron, B., Kilner, C. and Kolla, S. (2011) ‘Hexatriene formation from the regiospecific alkene cross-metathesis of trans-1-(buta-1,3-dien-1-yl)-2-acryloyloxynaphthaleneJournal of chemical research , 35 (9), pp. 531-535. ISSN 1747-5198

Chaitanya, K., Santhamma, C., Heron, B., Gabbutt, C. and Instone, A. (2011) ‘Vibrational assignment of the spectral data and thermodynamic properties of 2-chloro-4-fluorobenzophenone using DFT quantum chemical calculationsVibrational Spectroscopy , 57 (1), pp. 35-41. ISSN 0924-2031

Curtis, A., Gabbutt, C., Heron, B. and Kilner, C. (2011) ‘Direct formation of ?,?-unsaturated dithioacetals from diarylpropynolsTetrahedron Letters , 52 (6), pp. 708-710. ISSN 0040-4039

2010

Gabbutt, C., Heron, B., Kilner, C. and Kolla, S. (2010) ‘Benzopentalenonaphthalenones from the intramolecular capture of a merocyanine derived from a naphthopyranChemical Communications , 46 (44), pp. 8481-8483. ISSN 1359-7345

Gabbutt, C., Heron, B., Kilner, C. and Kolla, S. (2010) ‘The influence of a 1,1-diarylvinyl moiety on the photochromism of naphthopyransOrganic & Biomolecular Chemistry , 8 (21), pp. 4874-4883. ISSN 1477-0520

2009

Aiken, S., Gabbutt, C., Heron, B., Kershaw, C., Smith, N. and Cano, J.(2009) Photochromic Dichroic Naphthopyrans and Optical Articles Containing them. WO/2009109546.

Aiken, S., Gabbutt, C., Heron, B., Kershaw, C., Smith, N. and Cano, J.(2009) Photochromic Dichroic Naphthopyrans and Optical Articles Containing them. EP/2098520.

2008

Gabbutt, C., Heron, B., Kolla, S., Kilner, C., Coles, S., Horton, P. and Hursthouse, M. (2008) ‘Ring contraction during the 6?-electrocyclisation of naphthopyran valence tautomersOrganic & Biomolecular Chemistry , 6 (17), pp. 3096-3104. ISSN 1477-0520

Gabbutt, C., Heron, B., Kolla, S. and Mcgivern, M. (2008) ‘Two Stage Colour Modulation of Triarylmethine Dyes Derived from a Photochromic NaphthopyranEuropean Journal of Organic Chemistry , 2008 (12), pp. 2031-2034. ISSN 1434-193X

Aiken, S., Cano, J., Gabbutt, C. and Heron, B.(2008) 6-Biphenyl-Ester-3H-Naphtho[2,1-b]pyrans as Photochromic Dichroic Dyes and Optical Articles Containing Them. WO2008029194.

Aiken, S., Cano, J., Gabbutt, C., Heron, B., Kosa, T., Su, L., Sukhomlinova, L. and Taheri, B.(2008) 3H-Naphtho[2,1-b]pyrans as Photochromic Dichroic Dyes and Optical Articles Containing Them. WO/2008080226.

Aiken, S., Cano, J., Gabbutt, C. and Heron, B.(2008) 6-Biphenyl-Ester-3H-Naphtho[2,1-b]pyrans as Photochromic Dichroic Dyes and Optical Articles Containing Them. WO2008028930.

Gabbutt, C., Heron, B., Instone, A., Kolla, S., Mahajan, K., Coelho, P. and Carvalho, L. (2008) ‘Synthesis and photochromic properties of symmetrical aryl ether linked bi- and tri-naphthopyransDyes and Pigments , 76 (1), pp. 24-34. ISSN 0143-7208

2007

Sriprom, W., Néel, M., Gabbutt, C., Heron, B. and Perrier, S. (2007) ‘Tuning the color switching of naphthopyrans via the control of polymeric architecturesJournal of Materials Chemistry , 17 (19), pp. 1885-1893. ISSN 0959-9428

2006

Gabbutt, C., Hargrove, T., Heron, B., Jones, D., Poyner, C., Yildiz, E., Horton, P. and Hursthouse, M. (2006) ‘Oxidation and ring cleavage reactions of 3-benzhydrylchromones. Generation of triarylmethine cations from methylidenechroman-4-ones and benzopyrano[4,3-c]pyrazolesTetrahedron , 62 (47), pp. 10945-10953. ISSN 0040-4020

Gabbutt, C., Heron, B. and Instone, A. (2006) ‘The synthesis and electronic absorption spectra of 3-phenyl-3(4-pyrrolidino-2-substituted phenyl)-3H-naphtho[2,1-b]pyrans: further exploration of the ortho substituent effectTetrahedron , 62 (4), pp. 737-745. ISSN 0040-4020

2005

Gabbutt, C., Heron, B., Thomas, D., Partington, S., Light, M. and Hursthouse, M. (2005) ‘Photochromic Naphthopyrans Containing a Latent Carbene UnitMolecular Crystals and Liquid Crystals , 431 (1), pp. 357-362. ISSN 1542-1406

Clarke, D., Gabbutt, C., Hepworth, J. and Heron, B. (2005) ‘Synthesis of 3-alkenyl-2-arylchromones and 2,3-dialkenylchromones via acid-catalysed retro-Michael ring opening of 3-acylchroman-4-onesTetrahedron Letters , 46 (33), pp. 5515-5519. ISSN 0040-4039

Gabbutt, C., Heron, B., Mars, C. and Partington, S. (2005) ‘Synthesis and Photochromic Properties of 2H,9H-Indeno[1,2-f]- and 3H,7H-Indeno[2,1-i]- naphtho[2,1-b]pyransMolecular Crystals and Liquid Crystals , 430 (1), pp. 167-172. ISSN 1542-1406

Afrasiabi, Z., Sinn, E., Kulkarni, P., Ambike, V., Padhye, S., Deobagakar, D., Heron, B., Gabbutt, C., Anson, C. and Powell, A. (2005) ‘Synthesis and characterization of copper(II) complexes of 4-alkyl/aryl-1,2-naphthoquinones thiosemicarbazones derivatives as potent DNA cleaving agentsInorganica Chimica Acta , 358 (6), pp. 2023-2030. ISSN 0020-1693

Gabbutt, C., Heron, B., Instone, A., Horton, P. and Hursthouse, M. (2005) ‘Synthesis and photochromic properties of substituted 3H-naphtho[2,1-b]pyransTetrahedron , 61 (2), pp. 463-471. ISSN 0040-4020

2004

Gabbutt, C., Heron, B., Thomas, D., Light, M. and Hursthouse, M. (2004) ‘Carbenoid induced irreversible ring opening of naphthopyransTetrahedron Letters , 45 (32), pp. 6151-6154. ISSN 0040-4039

Heron, B., Gabbutt, C., Hepworth, J., Thomas, D., Kilner, C. and Partington, S. (2004) ‘Synthesis and Photochromic Properties of Methoxy Substituted 2,2-Diaryl-2H-naphtho[1,2-b]pyransHeterocycles , 63 (3), pp. 567-582. ISSN 0385-5414

Aiken, S., Gabbutt, C., Heron, B., Instone, A., Horton, P. and Hursthouse, M. (2004) ‘Making light work in colour chemistryAdvances in Colour Science & Technology , 7 (3), pp. 55-65. ISSN 1462-4761

2003

Aiken, S., Gabbutt, C. and Heron, B. (2003) ‘Synthesis and photochromic properties of aryl-, heteroaryl- and biphenyl- linked 3H-naphtho[2,1-b]pryans’. In: 19th International Congress on Heterocyclic Chemistry: Book of Abstracts . : Elsevier. p. 102. ISBN 9780080443041

Gabbutt, C., Heron, B., Mars, C., Light, M. and Hursthouse, M. (2003) ‘Novel phosphorus ylides from ANRORC and ring cleavage reactions of 3-(aryliminomethyl)chromones’. In: 19th International Congress on Heterocyclic Chemistry: Book of Abstracts . : Elsevier. p. 234. ISBN 9780080443041

Daia, D., Clarke, D., Gabbutt, C., Hepworth, J. and Heron, B. (2003) ‘Transformations of 3-acylchromones into alkenyl and allenyl chromones’. In: 19th International Congress on Heterocyclic Chemistry: Book of Abstracts . : Elsevier. p. 156. ISBN 9780080443041

Gabbutt, C., Heron, B. and Thomas, D. (2003) ‘Observations on the synthesis and reactivity of photochromic naphthopyrans’. In: 19th International Congress on Heterocyclic Chemistry: Book of Abstracts . : Elsevier. p. 171. ISBN 9780080443041

Gabbutt, C., Heron, B., Instone, A., Thomas, D., Partington, S., Hursthouse, M. and Gelbrich, T. (2003) ‘Observations on the Synthesis of Photochromic NaphthopyransEuropean Journal of Organic Chemistry , 2003 (7), pp. 1220-1230. ISSN 1434-193X

Heron, B., Gabbutt, C. and Instone, A. (2003) ‘Control of the Fading Properties of Photochromic 3,3-Diaryl-3H-naphtho- [2,1-b]pyransHeterocycles , 60 (4), pp. 843-855. ISSN 0385-5414

Daia, D., Gabbutt, C., Heron, B., Hepworth, J., Hursthouse, M. and Malik, K. (2003) ‘Conjugate additions of lithium dialkynylcuprates [(RC?C)2CuLi] to activated chromones. Unexpected formation of the 6H-bis[1]benzopyrano[2,3-b:3?,4?-e]pyridine systemTetrahedron Letters , 44 (7), pp. 1461-1464. ISSN 0040-4039

Gabbutt, C., Heron, B. and Instone, A. (2003) ‘Control of the fading properties of photochromic 3,3-diaryl-3H-naphtho[2,1-b] pryansAdvances in Colour Science & Technology , 6 (4), pp. 116-118. ISSN 1462-4761

2002

Gabbutt, C., Hepworth, J., Heron, B. and Pugh, S. (2002) ‘A facile route to pyrroles, isoindoles and hetero fused analoguesJournal of the Chemical Society, Perkin Transactions 1 (24), pp. 2799-2808. ISSN 1472-7781

Gabbutt, C., Gelbrich, T., Hepworth, J., Heron, B., Hursthouse, M. and Partington, S. (2002) ‘Synthesis and photochromic properties of some fluorine-containing naphthopyransDyes and Pigments , 54 (1), pp. 79-93. ISSN 0143-7208

Daia, G., Gabbutt, C., Hepworth, J., Heron, B., Hibbs, D. and Hursthouse, M. (2002) ‘Synthesis and cycloadditions of 9H-furo[3,4-b][1]benzo(thio)pyran-9-ones: furan ring formation by a novel hydrolytically induced cycloreversionTetrahedron Letters , 43 (25), pp. 4507-4510. ISSN 0040-4039

Gabbutt, C., Heron, B., McCreary, J. and Thomas, D. (2002) ‘Unusual aminations with tetramethylguanidineJournal of chemical research , 2002 (2), pp. 69-71. ISSN 1747-5198

2001

Gabbutt, C., Hepworth, J., Heron, B., Partington, S. and Thomas, D. (2001) ‘Synthesis and spectroscopic properties of some merocyanine dyesDyes and Pigments , 49 (1), pp. 65-74. ISSN 0143-7208

Clarke , D., Heron, B., Gabbutt, C., Hepworth, J., Partington, S. and Corns, S.(2001) Rapid Fading Photo-Responsive Materials. WO/2001/012619.

2000

Gabbutt, C., Hepworth, J., Heron, B. and Partington, S. (2000) ‘Photochromism of some thienobenzopyransDyes and Pigments , 47 (1-2), pp. 73-77. ISSN 0143-7208

Gabbutt, C., Hepworth, J., Heron, B., Coles, S. and Hursthouse, M. (2000) ‘Synthesis of some thiochromeno[4,3-c]- and [3,4-c]-pyrazolesJournal of the Chemical Society, Perkin Transactions 1 (17), pp. 2930-2938. ISSN 1470-4358

Gabbutt, C., Heron, B., Hursthouse, M. and Abdul Malik, K. (2000) ‘Conjugate addition of a phosphorus ylide to 3-cyanochromonePhosphorus, Sulfur, and Silicon and the Related Elements , 166 (1), pp. 99-109. ISSN 1042-6507

Clarke , D., Heron, B., Gabbutt, C., Hepworth, J., Partington, S. and Corns, S.(2000) Photochromic Substituted 2H-Naphtho[1,2-b]pyrans. WO/2000/035902 .

Clarke , D., Heron, B., Gabbutt, C., Hepworth, J., Partington, S. and Corns, S.(2000) Grey Colouring Photochromic Fused Pyrans. WO/2000/018755.

Gabbutt, C., Hepworth, J., Heron, B. and Partington, S. (2000) ‘Protolysis of Spironaphtho(aza)pyranoindolesMolecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals , 345 (1), pp. 323-328. ISSN 1058-725X

Gabbutt, C., Hepworth, J., Heron, B. and Partington, S. (2000) ‘Photochromism of Some HeterobenzopyransMolecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals , 344 (1), pp. 229-234. ISSN 1058-725X

1999

Gabbutt, C., Hepworth, J., Heron, B., Rahman, M., Coles, S. and Hursthouse, M. (1999) ‘Synthesis and reactivity of some 3,4-dibromo-2H-[1]benzopyrans: The generation and reactions of 3,4-didehydro-2H-[1]benzopyranTetrahedron , 55 (34), pp. 10467-10480. ISSN 0040-4020

Gabbutt, C., Hepworth, J., Heron, B. and Thomas, J. (1999) ‘A novel acylative ring cleavage of benzothieno[3,2-b]pyran-4-ols: application to the synthesis of dibenzothiophenes and fused-ring derivativesChemical Communications (6), pp. 541-542. ISSN 1359-7345

Clarke , D., Heron, B., Gabbutt, C., Hepworth, J., Partington, S. and Corns, S.(1999) Naphthopyran Photochromic Dyes Sensitive to pH. WO/1999/031081 .

Gabbutt, C., Hepworth, J. and Heron, B. (1999) ‘An NMR investigation of the merocyanine dyes generated by protolysis of some novel spironaphthopyranoindolesDyes and Pigments , 42 (1), pp. 35-43. ISSN 0143-7208

Clarke , D., Heron, B., Gabbutt, C., Hepworth, J., Partington, S. and Corns, S.(1999) Photochromic Compounds. WO/1999/020630 .

Gabbutt, C., Hepworth, J., Heron, B., Elsegood, M. and Clegg, W. (1999) ‘An unusual ring expansion from the Zav’yalov pyrrole synthesis: formation of oxacino[2,3-c]pyrrolesChemical Communications (3), pp. 289-290. ISSN 1359-7345

Hepworth, J., Gabbutt, C. and Heron, B. (1999) ‘Photochromism of naphthopyrans’. In: Dye & pigment chemistry (Colour science '98 : Proceedings of the international conference & exhibition. : University of Leeds . pp. 161-173. ISBN 9780853161967

1998

Gabbutt, C., Hepworth, J., Heron, B., Jones, A., Raper, E. and Clegg, W. (1998) ‘Structural studies of a novel heterocyclic phosphoranePhosphorus, Sulfur, and Silicon and the Related Elements , 143 (1), pp. 221-230. ISSN 1042-6507

Clarke , D., Heron, B., Gabbutt, C., Hepworth, J., Partington, S. and Corns, S.(1998) Red Colouring Hyperchromic 3H-Naphtho[2,1-b]pyrans. WO/1998/045281.

Clarke , D., Heron, B., Gabbutt, C., Hepworth, J., Partington, S. and Corns, S.(1998) Neutral Colouring Photochromic 2H-Naphtho[1,2-b]pyrans and Heterocyclic Pyrans and Their Use. WO/1998/042693.

Clarke , D., Heron, B., Gabbutt, C., Hepworth, J., Partington, S. and Corns, S.(1998) Intense Colouring Photochromic 2H-Naphtho[1,2-b]pyrans and Heterocyclic Pyrans . WO/1998/042695 .

Daia, G., Gabbutt, C., Hepworth, J., Heron, B., Hibbs, D. and Hursthouse, M. (1998) ‘The directed lithiation of some 3-acylchromone acetalsTetrahedron Letters , 39 (10), pp. 1215-1218. ISSN 0040-4039

Gabbutt, C., Hepworth, J., Heron, B. and Thomas, J. (1998) ‘The oxidative ring expansion of spiro-annulated chroman-4-ones: Syntheses of the rotenoid core and related benzoxanthonesTetrahedron Letters , 39 (8), pp. 881-884. ISSN 0040-4039

1997

Gabbutt, C., Hepworth, J. and Heron, B. (1997) ‘A facile synthesis of some benzothiopyrano [4,3-b] pyrrolesJournal of Chemical Research , pp. 102-103. ISSN 0308-2342

1996

Hepworth, J., Gabbutt, C. and Heron, B. (1996) ‘Pyrans and their Benzo Derivatives - Structure’. In: Comprehensive Heterocyclic Chemistry II. : Pergamon. pp. 301-350. ISBN 9780080420721

Hepworth, J., Gabbutt, C. and Heron, B. (1996) ‘Pyrans and their Benzo Derivatives - Synthesis’. In: Comprehensive Heterocyclic Chemistry II. : Pergamon. pp. 351-468. ISBN 9780080420721

Gabbutt, C., Heron, B., Hepworth, J. and Rahman, M. (1996) ‘The generation and reactions of 3,4-didehydro-2H-[1]benzopyran, a highly strained heterocycleTetrahedron Letters , 37 (8), pp. 1313-1316. ISSN 0040-4039

1995

Gabbutt, C., Hepworth, J. and Heron, B. (1995) ‘Reactions of some 2H-Chromenes and 2H-Thiochromenes with triazolinedionesTetrahedron , 51 (48), pp. 13277-13290. ISSN 0040-4020

Gabbutt, C., Hepworth, J. and Heron, B. (1995) ‘The reaction of methylenetriphenylphosphorane with aromatic heterocyclic 1,2-diketonesJournal of Chemical Research (miniprint) , p. M0805-M0819. ISSN 0308-2350

Gabbutt, C., Hepworth, J. and Heron, B. (1995) ‘The reaction of methylenetriphenylphosphorane with aromatic and heterocyclic 1,2-diketonesJournal of Chemical Research , pp. 118-119. ISSN 0308-2342

1994

Gabbutt, C., Hepworth, J. and Heron, B. (1994) ‘Synthesis and reactivity of some thiochroman-3,4-diones.Tetrahedron , 50 (26), pp. 7865-7878. ISSN 0040-4020

Gabbutt, C., D. Hepworth, J. and Heron, B. (1994) ‘A new reaction of ?-chloro-?-chlorosulfenyl ketones: facile syntheses of 3,3-dichloro- and 3-chloro-chroman-4-ones and thiochroman-4-onesTetrahedron , 50 (17), pp. 5245-5254. ISSN 0040-4020

Gabbutt, C., Hartley, D., Hepworth, J., Heron, B., Kanjia, M. and Rahman, M. (1994) ‘Synthesis and reactivity of some 4-bromo- 2H-chromenes and 2H-thiochromenesTetrahedron , 50 (8), pp. 2507-2522. ISSN 0040-4020

Gabbutt, C., Hepworth, J. and Heron, B. (1994) ‘Expedient syntheses of the rotenoid and thiorotenoid systemsJournal of the Chemical Society, Perkin Transactions 1 (6), pp. 653-657. ISSN 0300-922X

Gabbutt, C., Hepworth, J., Heron, B. and Rahman, M. (1994) ‘Allenes from 3-bromo-2H-1-benzopyransJournal of the Chemical Society, Perkin Transactions 1 (13), pp. 1733-1737. ISSN 0300-922X

Gabbutt, C., Hepworth, J., Heron, B. and Kanjia, M. (1994) ‘Ring contraction of sulfenamides derived from thiochroman-4-onesTetrahedron , 50 (3), pp. 827-834. ISSN 0040-4020

Bethune, R., Gabbutt, C., Guinot, S., Hepworth, J. and Heron, B. (1994) ‘Directed lithiation of some chroman-4-olsJournal of the Chemical Society, Perkin Transactions 1 (14), pp. 1925-1933. ISSN 0300-922X

1993

Clayton, S., Gabbutt, C., Hepworth, J. and Heron, B. (1993) ‘Direct aromatic tert-butylation during the synthesis of thiochroman-4-onesTetrahedron , 49 (4), pp. 939-946. ISSN 0040-4020

1992

Gabbutt, C., Hepworth, J. and Heron, B. (1992) ‘Synthesis of the 5-thiorotenoid system from thiochroman-3-oneJournal of the Chemical Society, Perkin Transactions 1 (22), pp. 3015-3018. ISSN 0300-922X

Gabbutt, C., Hepworth, J. and Heron, B. (1992) ‘Enamino ketones as precursors of functionalised 2H-thiopyrans and thiopyrano[2,3-c]- and [3,2-b]-benzothiopyransJournal of the Chemical Society, Perkin Transactions 1 (20), pp. 2603-2608. ISSN 0300-922X

Esteem

Editor: Journal of Chemical Research (since 2010)

Regular reviewer for: Journal of Organic Chemistry, Organic and Biomolecular Chemistry, European Journal of Organic Chemistry, Tetrahedron, Chemical Society Reviews, Chemistry, A European Journal, Angewandte Chemie International Edition.

Research has contributed to industrial sponsors gaining:

  • The Chemical Industries Association Award (2005)
  • Queen’s Award to Industry (Enterprise) (2006)
  • Highly commended runner-up Royal Society of Chemistry Teamwork and Innovation Award (2006)

PhD Examiner

Various UK and overseas (India, Pakistan) universities

Invited review chapters

  • Rodd’s Chemistry of Carbon Compounds (1988)
  • Comprehensive Heterocyclic Chemistry I and II, Comprehensive Organic Functional Group Transformations I (1984, 1995 and 1996)

Collaborations

Numerous industrial collaborations. Academic collaborations include the Universities of Bordeaux and Lille.

Research Degree Supervision

New approaches for the synthesis and functionalistion of chromones and 4-quinolones
A novel approach to generate ortho-substituted arylpropynones, precursors to these important heterocycles will be explored. New metal-mediated C-H bond functionalistion protocols will be investigated.

Synthesis and spectroscopic investigation of photochromic systems.
The synthesis of bi-photochromic systems in which a naphthopyran possessing an embedded di(heteroaryl)ethene be explored – these systems offer the potential for multiply addressable systems for optical data storage.

Synthesis of pseudoazulenes.
Pseudoazulenes represent an interesting and diverse class of heterocycle. Many have emerging applications in advanced materials, for example as electrochromes or in dye-sensitised solar cells. New approaches to a variety of pseudoazulenes via electrocyclisation reactions of heteroaryl-linked Schiff bases and azobenzenes and also via metal-meditated C-H functionalisation reactions of arylazoles will be explored.

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