US 5,236,958 AGranted

Benzoselenazolino-vinylspiropyran compound

AssigneeOtsuka Kagaku Kabushiki Kaisha

InventorAkira Miyashita

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Abstract

The present invention provides a photochromic compound of the formula (Ia) ##STR1## wherein R.sup.1 is a C.sub.1 -C.sub.20 alkyl group or an aralkyl group; R.sup.2, R.sup.3, R.sup.4 and R.sup.5 each represents H, a C.sub.1 -C.sub.6 alkyl group, an aryl group, an aralkyl group, a C.sub.1 -C.sub.5 alkoxy group, a halogen atom, a cyano group, a trichloromethyl group, a trifluoromethyl group or a nitro group; R.sup.6 and R.sup.7 each represents H, a C.sub.1 -C.sup.6 alkyl group, an aryl group, an aralkyl group, a halogen atom, a cyano group or a nitro group; and X is an oxygen atom or a sulfur atom, and a homopolymer of the above compound or a copolymer of the above compound and a vinyl compound represented by the formula C H.sub.2 .dbd.C (Y) (Z) wherein Y is H or CH.sub.3 ; and Z is a carboxyl group, an alkoxy-carbonyl group, a cyano group, a carbamoyl group, an N,N-dimethylcarbamoyl group, an acetoxy group, a phenyl group or a methylphenyl group.

Claims4

Dependent claims

A benzoselenazolino-vinylspiropyran compound of the formula ##STR27## wherein R.sup.1 is an alkyl group having 1 to 20 carbon atoms or a phenyl-C.sub.1 -C.sub.6 alkyl group optionally substituted on phenyl by one to five substituents selected from the group consisting of C.sub.1 -C.sub.6 alkyl group, C.sub.1 -C.sub.6 alkoxy group, halogen atom, cyano group, trichloromethyl group, trifluoromethyl group and nitro group;

R.sup.2, R.sup.3, R.sup.4 and R.sup.5 are the same or different and each represents a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, a phenyl group, a naphthyl group or a phenyl-C.sub.1 -C.sub.6 alkyl group each optionally substituted by one to five of said substituents;
an alkoxy group having 1 to 5 carbon atoms, a halogen atom, a cyano group, a trichloromethyl group, a trifluoromethyl group or a nitro group;
R.sup.6 and R.sup.7 are the same or different and each represents a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, a phenyl group, a naphthyl group or a phenyl-C.sub.1 -C.sub.6 alkyl group each optionally substituted by one to five or said substituents;
a halogen atom, a cyano group or a nitro group;
and X is an oxygen atom or a sulfur atom.

2 more elements

Dependencies are inferred from the claim text.