Dir couplers with hydrolyzable inhibitors for use in high PH processed films

摘要

An Ag halide photographic material for development in a soln. of pH at least 11.4 comprises a support bearing an Ag halide layer which contains a novel cpd. of formula (I) capable of releasing a development inhibitor having a decomposition half-life of 4-225 (6-120) hours at pH 10.0, the cpd. after decomposition having substantially no photographic inhibitor properties. IN (I), CAR is carrier moiety releasing -(TIME)n-INH-L-Y by reaction with oxidised developer; TIME is timing gp.; INH-L-Y is a development inhibitor moiety selected from oxazole, thiazole, diazole, oxathiazole, triazole, thiatriazole, tetrazole, benzimidazole, imidazole, isoindazole, mercaptothiazole, mercaptotriazole, mercaptothiadiazole, mercaptotetrazole, selenotriazole, mercaptooxadiazole, selenobenzothiazole, mercaptobenzoxazole, selenobenzoxazole, mercaptobenzimidazole, selenobenzimidazole, benzodiazole or benzoisodiazole such that the moiety has a calculated log P greater than 0.4; n is 0, 1 or 2; L is divalent connecting gp. contg. a chemical bond broken in a photographic soln. and selected from CO2, N, ReCO2, SO2N, OCH2CH2SO2, OC(=O)O and NReC(=O)C(=O); R is H, alkyl, alkenyl, aryl or heterocycle; Y is alkyl, alkenyl, aryl or heterocycle.