Cyan dye-forming couplers and photographic materials...

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

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G03C 7/34 (2006.01) C07C 275/18 (2006.01) C07C 315/04 (2006.01) G03C 7/305 (2006.01) C07C 317/44 (2006.01)

Patent

CA 1305349

-0- CYAN DYE-FORMING COUPLER 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 substituent containing a sulfone group having bulky 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, R2, R3 and Z are as defined in the specification. The couplers are useful in photographic emulsion.

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