Spirooxazines and use thereof in the field of ophthalmic optics
US5529725A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 17, 1994 |
| Grant date | Jun 25, 1996 |
| Priority date | — |
| Expiry date | Nov 17, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C1/685
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.