Method of preparing a magenta development inhibitor releasing co

Details Method of preparing a magenta development inhibitor releasing co Method of preparing a magenta development inhibitor releasing co

1992-06-30

1994-11-08

Springer, David B.

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

548142, 548185, 548229, 548257, 430544, C07D40314, C07D41314, C07D41714, G03C 7305

Patent

active

053628802

ABSTRACT:
Disclosed is a method of preparing a photographic coupler comprised of 1-aryl-3-substituted-4-heterocyclic-5-pyrazolone development inhibitor releasing coupler for use in a photographic element, said coupler capable of reacting with oxidized color developer to release a heterocyclic coupling-off group containing an inhibitor.

REFERENCES:
patent: 4248962 (1981-02-01), Lau
patent: 4409323 (1983-10-01), Sato et al.
patent: 4861701 (1989-08-01), Burns et al.

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