| abstract |
(57) [Summary] (Modified) [Objective] To provide benzothioxanthone oxides, which are useful for optically preserving information, as a reversible photochromic system, and a method for producing the same. [Structure] The following formula I or formula III; (In the formula, R is unsubstituted, C 1 -C 12 alkyl, C 1 -C 12 alkoxy, C 1 -C 12 alkylthio, phenyl, benzyl, -CN, -CF 3, halogen or - C 6 -C 14 aryl group substituted with COOR 3 ; x is 1 Or 2; R 1 is H, linear or branched C 1 -C 12 alkyl, C 2 -C 12 alkenyl or C 2 -C 12 alkynyl, C 7 -C 16 aralkyl, C 8 -C 16 alkylaralkyl, -CH 2 COOR 3 or C 1 -C 12 acyl group; R 3 is, H, C 1 -C 18 alkyl, cyclohexyl, cyclopentyl, phenyl, C 1 -C 12 alkylphenyl, benzyl or C 1 -C 12 alkylbenzyl A group) or a mixture thereof. |