Cyan dye-forming couplers and photographic materials...

Details Cyan dye-forming couplers and photographic materials... Cyan dye-forming couplers and photographic materials...

G - Physics

03

C

96/117

G03C 7/34 (2006.01) C07C 275/24 (2006.01) G03C 7/305 (2006.01)

Patent

CA 1298131

-0- CYAN DYE-FORMING COUPLERS AND PHOTOGRAPHIC MATERIALS CONTAINING SAME Abstract Novel phenolic cyan dye-forming couplers contain a p-cyanophenylureido group in the 2-position and in the 5-position an acylamino group containing bulky alicyclic or heterocyclic substituents sufficient to provide steric interaction within the coupler molecule and the dye molecule derived therefrom. The couplers are represented by the formula: Image wherein: R1, Q, A, Y and Z are as defined in the specification. The couplers are useful in photographic emulsion.

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