COUPLER FOR COLOR PHOTOGRAPHY, SILVER HALIDE COLOR PHOTOGRAPHIC SENSITIVE MATERIAL CONTAINING THIS COUPLER AND COLOR IMAGE FORMING METHOD

摘要

PURPOSE:To improve color developability and sensitivity and to have high stability by incorporating the specific coupler for color photography into the photosensitive material. CONSTITUTION:The coupler expressed by formula I is incorporated into the photosensitive material. In the formula, R1 denotes a substituent; l denotes 0 to 4 integer; R1 may be the same or different when l is =2. R2 denotes a hydrogen atom or alkyl group; R3 denotes an alkyl group; R4 denotes R5- SO2-group, etc.; R5 denotes an alkyl group, aryl group, etc. X denotes a hydrogen atom or the substituent which can be eliminated by the coupling reaction with the oxidant of an arom. primary color developing agent. The photosensitive material having the excellent gradation and max. color developing density and having the high stability is obtd. in this way.