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Neutral Colouring Photochromic 2H-Naphtho[1,2-b]pyrans and Heterocyclic Pyrans and Their Use

Clarke, David A., Heron, B. Mark, Gabbutt, Christopher D., Hepworth, John D., Partington, Steven M. and Corns, Stephen N. (1998) Neutral Colouring Photochromic 2H-Naphtho[1,2-b]pyrans and Heterocyclic Pyrans and Their Use. WO/1998/042693.

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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.

Item Type: Patent
Subjects: Q Science > QD Chemistry
Schools: School of Applied Sciences
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Depositing User: Graham Stone
Date Deposited: 19 Oct 2012 12:52
Last Modified: 28 Aug 2021 11:23


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