Patent ID: 7262294
Filing Date: 2007-08-28
Classification: C07D,C07F,C08K,G03C

Abstract:
1. A photochromatic compound belonging to the groups of chromenes and spiro-pyrans having general formula (I): wherein: R represents a linear or branched C hetero-aromatic groups with 5-10 atoms, heterocyclic groups with 5-6 atoms, hydroxyl groups, hydroxyalkyl groups, carboxyl groups, cyano groups, linear C branched C a 1,2,2,6,6-pentamethylpiperidine group, a vinyl group, a (meth)allyl group, a linear C a branched C an aryl group selected from the group consisting of phenyl, biphenyl and naphthyl, a COOR′ a benzyl group, a linear or branched C a linear or branched C a vinyl group, a (meth)allyl group, a linear or branched C a COOR′ a linear or branched C an N,N-dialkyl-(C one of the following groups having general formula (III), (IV) or (V):