| 摘要 |
Light-sensitive recording material for color photography is provided which contains, in at least one silver halide emulsion layer, a yellow coupler of the formula <IMAGE> in which R and R' are alkyl, cycloalkyl or aryl and X1 and X2 are radicals which are detachable during the coupling reaction, Y is halogen, alkyl, alkoxy, alkylmercapto, -CN, -COOH, carbalkoxy, -NH2, -NHR1, -NR1R2 or -NHCOR1, in which R1 and R2 are alkyl or phenyl, Z is alkyl having 5 to 40 carbon atoms, alkoxy having 5 to 40 carbon atoms, cycloalkoxy having 5 to 12 carbon atoms or aralkyl; alkoxyalkyl, alkoxycycloalkyl, cycloalkoxyalkyl, optionally substituted phenoxyalkyl, alkylamino- and dialkylamino-alkyl, optionally substituted arylamino- and diarylamino-alkyl, alkylmercaptoalkyl or optionally substituted arylmercaptoalkyl, in which radicals the sum of the carbon atoms in each case is 6 to 40; or -COOR3, -COR3, -NR3R4, -CONR3R4, -NR4COR3, -SO2R3, -SO2NR3R4 or -NR4SO2R3, R3 is optionally substituted alkyl having 1 to 40 carbon atoms, optionally substituted cycloalkyl having 5 to 12 carbon atoms or optionally substituted phenyl and R4 is hydrogen or alkyl having 1 to 12 carbon atoms. The couplers used according to the invention have a high coupling reactivity towards the oxidation product of the aromatic primary amine (developer), so that the developing of the silver halide emulsion proceeds rapidly. Furthermore, an adequate color density is achieved, although the molar amont of coupler employed can be markedly reduced compared with that of known couplers.
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