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US 3,941,816 AGranted
Stabilized oxichromic compounds
AssigneeEastman Kodak Company
InventorAlbert Edward Anderson, Jr.
Life of this patent
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Abstract
Stabilized oxichromic compounds are disclosed, along with processes for stabilizing oxichromic compounds. In one aspect, the stabilized compounds are O-acylated compounds which contain a reduced azomethine linkage. In another aspect, the stabilized compounds are O-acylated compounds which can undergo base catalyzed chromogenic oxidation to produce a yellow dye.
Claims10
A compound having the formula:
- ##EQU6## wherein R.sup.1 is a group of the formula:
- ##EQU7## wherein R.sup.4 is an alkyl group containing from 1-6 carbon atoms or an aryl group containing from 6-12 carbon atoms;
- Ar is an arylene group having from about 6-20 carbon atoms;
- R.sup.2 can be a hydrogen atom or the same substituents as R.sup.1 ;
- and (KMC) is an open-chain ketomethylene color coupler containing a group of the formula:
- ##EQU8## wherein * represents the coupling position which forms a bond with the said nitrogen atom attached to Ar to provide a reduced azomethine linkage.
3 more elements
A compound having the formula:
- ##SPC9##
A compound having the formula:
- ##SPC10##
A compound of the formula:
- ##EQU9## wherein D-- is an aromatic nucleus which is disubstitued with hydroxyl groups, primary amino groups or alkylamino groups to provide a silver halide developer;
- R.sup.1 is a group of the formula:
- ##EQU10## wherein R.sup.4 is an alkyl group containing from 1-6 carbon atoms or an aryl group containing from 6-12 carbon atoms;
- Ar is an arylene group having from about 6-20 carbon atoms;
- R.sup.2 can be a hydrogen atom or the same substituents as R.sup.1 ;
- and (KMC) is an open-chain ketomethylene color coupler containing a group of the formula:
- ##EQU11## wherein * represents the coupling position which forms a bond with the said nitrogen atom attached to Ar to provide a reduced azomethine linkage.
4 more elements
Dependencies are inferred from the claim text.