Spirooxazines and use thereof in the field of ophthalmic optics

Details Spirooxazines and use thereof in the field of ophthalmic optics Spirooxazines and use thereof in the field of ophthalmic optics

1994-11-17

1996-06-25

Tucker, Philip

Compositions

Light transmission modifying compositions

Displaying color change

544 71, G02B 523, C07D26500

Patent

active

055297250

ABSTRACT:
The invention relates to photochromic compounds of general formula: ##STR1## in which: R.sup.a and R.sup.b denote hydrogen; alkyl; OR, SR, COR or COOR where R denotes hydrogen, alkyl, aryl or heteroaryl; a group NR.sub.1 R.sub.2 where R.sub.1 R.sub.2 denotes hydrogen, C.sub.4 -C.sub.7 alkyl or cycloalkyl, aryl, or form with the nitrogen a C.sub.4 -C.sub.7 heterocycle; NO.sub.2, CN, SCN or a halogen; a group SO.sub.3 R' where R' denotes hydrogen or an alkali metal; a mono- or polyhaloalkyl; m denotes an integer from 1 to 4 and n is equal to 1 or 2;
Cy denotes an aromatic ring or an aromatic or non-aromatic heterocycle;
R.sup.c denotes an alkyl, allyl, phenyl or arylalkyl group which is mono- or disubstituted with alkyl, alkoxy or NO.sub.2 ; an alicyclic, an aliphatic hydrocarbon containing one or more hetero atoms;
R.sup.d, R.sup.e, R.sup.f and R.sup.g denote hydrogen, alkyl, alkoxy or thioalkyl or form in pairs a 4- to 7-membered cycloalkyl possibly containing hetero atoms which are optionally condensed with an aromatic ring; R.sup.h denotes hydrogen or forms with R.sup.d a 5- or 6-membered cycloalkyl; and the use thereof in ophthalmic optics.

REFERENCES:
patent: 5349065 (1994-09-01), Tanaka et al.

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