| 摘要 |
Highly active silver halide development inhibitors are released from DIR couplers corresponding to formula I during color development. Where DIR couplers are used in color photographic silver halide materials, high edge effects and high inter-image effects are obtained. A-(TIME)n-ZI In formula I, A is the residue of a coupler which couples with the oxidation product of a silver halide developing agent under the conditions of photographic development and, in doing so, releases a group corresponding to the following formula -(TIME)n-Z TIME is a binding link which together with the group Z (a triazole ring) attached thereto is releases on reaction of the coupler with the oxidation product of a silver halide developing agent and which, in turn, releases the group Z with delay under the development conditions; n is 0 or 1; Z is a triazole ring corresponding to one of the following formulae <IMAGE> R1 is alkylthio; R2 is H, alkyl, alkythio, aryl or a heterocyclic group; at least one of the substituents R1 and R2 contains at a distance of 2 to 4 atoms from the triazole ring a group -CO-OR3, -O-CO-OR3 or -O-CO-R3 hydrolyzable in aqueous alkali; R3 is alkyl, cycloalkyl or aryl.
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