E>>[PROBLEM TO BE SOLVED]: To provide a method for producing color coupler for a low-priced silver halide photography.[SOLUTION]: When the color coupler for the silver halide photography is manufactured from o-aminophenols obtained by catalytic reduction of o-nitrophenols and the acid halides, the solvent of alcohols can be used by contraries, and it is possible to execute it from the catalytic reduction and the amidification condensation reaction to the refinement in the single solvent, and produce low-priced cyan coupler without remaining the undesirable by-product on the photograph performances as fog and the desensitization, etc in the cyan coupler.
-
Page/Page column 6
(2008/06/13)
More Articles about upstream products of 99817-37-5