NEUTRAL COLOURING PHOTOCHROMIC 2H-NAPHTHO[1,2-b]PYRANS AND HETEROCYCLIC PYRANS

摘要

A naphtho[1,2-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 C1-C10 alkyl, C1-C20 cycloalkyl, C1-C20 bicycloalkyl, C1-C20 polycycloalkyl, linear or branched C1-C10 haloalkyl, linear or branched C1-C10 perhaloalkyl, linear or branched C1-C10 perhaloalkenyl, linear or branched C1-C10 alkenyl, C1-C10 alkynyl, linear or branched C1-C10 alkoxy, linear or branched C1-C10 alkylthio, linear or branched C1-C10 alkoxy (linear or branched C1-C10 alkyl), linear or branched C1-C10 hydroxyalkyl, linear or branched C1-C10 aminoalkyl, aryl, phenyl, heteroaryl, halogen, nitrile, nitro, amino, linear or branched C1-C20 alkoxycarbonyl, hydroxyl, formyl, acetyl, amido, C1-C5 alkyl amido, C1-C5 dialkylamido, aroyl, benzoyl, alkyl C1-C5 amino, dialkyl C1-C5 amino, arylamino, diarylamino, aryl C1-C5 alkylamino and cyclicamino groups, arylsulfinyl, arylsulfanyl, arylsulfonyl, linear or branched C1-C10 alkylsulfonyl, P(O)(O-C1-C10 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.