NAPHTOPYRANES AVEC UN HETEROCYCLE EN POSITION 5,6, PREPARATION ET COMPOSITIONS ET MATRICES (CO) POLYMERES LES RENFERMANT

摘要

The invention relates to novel compounds of the naphthopyran type with a fused heterocycle in the 5,6-position. These compounds have formula (I) or (II). These compounds (I) or (II) have valuable photochromic properties. The invention further relates to their preparation, to their applications as photochromic substances and to the compositions and matrices comprising them.