SpiroÝindoline-Ý2,3'¨-benzoxazine¨-type photochromic compounds containing a 6'-cyano or phenylsulphonyl group and with a 7', 8'-condensed benzene ring in the benzoxazine ring and use of same in ophthalmic optics

摘要

PCT No. PCT/FR95/01031 Sec. 371 Date Jan. 23, 1997 Sec. 102(e) Date Jan. 23, 1997 PCT Filed Jul. 31, 1995 PCT Pub. No. WO96/04590 PCT Pub. Date Feb. 15, 1996The present invention relates to photochromic compounds of spiro[indoline[2,3']-naphthoxazine] structure, characterized in that they contain, in the 6' position, a group R6 chosen from the following groups: cyano and phenylsulfonyl linked via the sulfur atom to carbon 6', and methods of using such compounds.