Photographic materials with couplers containing protected formyl

Details Photographic materials with couplers containing protected formyl Photographic materials with couplers containing protected formyl

1991-04-17

1992-12-08

Schilling, Richard L.

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Identified radiation sensitive composition with color...

430226, 430359, 430543, 430553, 430555, 430557, G03C 732, G03C 734, G03C 736, G03C 738

Patent

active

051697491

ABSTRACT:
The improved silver halide photographic material has a substantially colorless coupler that has a leaving group with a protected formyl group at the active site, said protected formyl group being such that subsequent to the elimination of the leaving group upon coupling reaction, the protective group for a formyl group undergoes cleavage, causing reaction with an aromatic primary amine to form a ballasted Schiff type dye. The novel substantially colorless coupler is capable of highly efficient dye formation.

REFERENCES:
patent: 4749644 (1988-06-01), Tosaka et al.
patent: 4777120 (1988-11-01), Lau
Patent Abstracts of Japan, vol. 11, No. 386 (P-647)[2833]Dec. 17, 1987.

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