Spiropyrans, optically active spiropyrans, as well as their use

摘要

A spiropyran compound represented by general formula (1), an optically active spiropyran compound prepared by introducing asymmetry into the spirocarbon atom of the above compound, and an optically functional material prepared therefrom. In said formula (1) R1 represents C¿1?-C20 alkyl, aralkyl, hydroxyethyl, methacryloxymethyl or methacryloxyethyl; R?2, R3, R4 and R5¿ represent each independently hydrogen, C¿1?-C6 alkyl, aryl, aralkyl, C1-C5 alkoxy, hydroxymethyl, carboxyl, halogen, amino, cyano, trichloromethyl, trifluoromethyl or nitro; R?6 and R7¿ represent each independently hydrogen, C¿1?-C6 alkyl, aryl, aralkyl, halogen, cyano or nitro; R?8¿ represents C¿1?-C6 alkyl, hydroxymethyl, carboxyl, methoxycarbonyl, methacryloxymethyl or vinyl; at least one of R?1¿ through R8 is substituted by a group functioning as an agent for optical resolution; and X represents oxygen or sulfur.