The present invention relates to novel compounds of the naphthopyran type which have an annelated carbocycle in position 5,6. These compounds are of formula (I) given below:
1
in which A is an alicyclic ring which is optionally annelated with an aromatic ring and in which two adjacent R
3
can together form at least one ring, for example a benzo group. These compounds (I) possess interesting photochromic properties. The invention also relates to the method of preparing these compounds (I), as well as their applications as photochromes and compositions and (co)polymer matrices comprising them.
本发明涉及一种新型的
萘并
吡喃类化合物,其在5,6位具有一个环合的碳环。这些化合物的
化学式如下:1其中A是一个脂环,可以与芳香环环合,在其中相邻的两个R3可以共同形成至少一个环,例如苯环。这些化合物(I)具有有趣的光致变色性质。本发明还涉及制备这些化合物(I)的方法,以及它们作为光致变色剂的应用、包含它们的组合物和(共)聚合物基体。