Silver halide colour photographic material and cyan coupler of the 2-phenylureido-5-acylaminophenol type
申请人:FUJI PHOTO FILM CO., LTD.
公开号:EP0423764A2
公开(公告)日:1991-04-24
There is disclosed a silver halide color photographic material having a silver halide emulsion layer on a base which comprises a novel cyan coupler. According to the disclosure, a silver halide color photographic material containing a cyan coupler that has high coupling reactivity and high color density, resulting color image being hardly susceptible to reduction fading and is excellent in heat fast can be obtained.
Improved method of synthesizing phenolic cyan-dye-forming photographic couplers
申请人:EASTMAN KODAK COMPANY
公开号:EP0430335A2
公开(公告)日:1991-06-05
Phenolic cyan-dye-forming couplers having a p-cyanophenylureido group in the 2-position of the phenol are synthesized in high yield by a process comprising the steps of contacting, in a reaction solvent in the presence of a transition metal catalyst at moderate temperature and atmospheric pressure, a coupler intermediate having a nitro group in the 5-position with a hydrogen donor, such as, for example, ammonium formate, to thereby form the corresponding 2-(p-cyanophenylureido)-5-aminophenol and reacting the 2-(p-cyanophenylureido)-5-aminophenol with an acylating agent to form the phenolic cyan-dye-forming coupler.