Photographic coupler

Radiation imagery chemistry: process – composition – or product th – Radiation sensitive product – Two or more radiation-sensitive layers containing other than...

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430555, 430558, G03C 140

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active

042411688

ABSTRACT:
A photographic two-equivalent magenta coupler represented by the following general formula (I): ##STR1## wherein [A] represents a magenta color image-forming coupler residue, and the ##STR2## moiety represents a group replacing a hydrogen atom of an active methylene group in coupler [A] wherein Z.sub.a Z.sub.b, Z.sub.c and Z.sub.d, which can be the same or different, each represents a methine group or an --N.dbd. group, and the nitrogen-containing ring formed by Z.sub.a to Z.sub.d may further be substituted with a fused ring, with the proviso that the ##STR3## moiety does not represent a benzotriazolyl-1, benzotriazolyl-2, benzimidazolyl-1 or indazolyl-1 group; a photographic light sensitive material containing the photographic coupler; and a method of forming images using the photographic coupler.

REFERENCES:
patent: 3930866 (1976-01-01), Oishi et al.
patent: 3933500 (1976-01-01), Shiba et al.
patent: 3935015 (1976-01-01), Arai et al.
patent: 4046575 (1977-09-01), Boie et al.
patent: 4076533 (1978-02-01), Ota et al.

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