A chromene compound which has a sulfur-containing substituent represented by the following formula (2) at the 6-position and/or 7-position carbon atom of an indeno (2,1-f)naphtho(1,2-b)pyran structure and is excellent in photochromic properties and stability at a high temperature.
(In the above formula, ring X is an aromatic hydrocarbon ring or aromatic heterocyclic ring, R
3
and R
4
are each independently an alkyl group, haloalkyl group, cycloalkyl group, alkoxy group, amino group, heterocyclic group containing a ring member nitrogen atom and bonded to the ring X bonded thereto via the nitrogen atom, halogen atom, aryloxy group or aryl group, and “a” is an integer of 0 to 4.)
一种含有
硫取代基的色
烯化合物,其在indeno(2,1-f)naphtho(1,2-b)pyran结构的6-位和/或7-位
碳原子处,用以下式子(2)表示,并且具有优异的光致变色性能和高温稳定性。(在上述式子中,环X是芳香族烃环或芳香族杂环环,R3和R4各自独立地是烷基,卤代烷基,
环烷基,烷
氧基,
氨基,含有环成员
氮原子并通过
氮原子与环X结合的杂环基,卤素原子,芳
氧基或芳基,而“a”是0到4的整数。)