Pyrazolone couplers and colour photographic silver halide recording material containing them
申请人:CIBA-GEIGY AG
公开号:EP0087388A1
公开(公告)日:1983-08-31
Pyrazolone colour couplers of the formula
wherein X is -0-, -S- or -Se-, R1 is hydrogen, halogen, alkyl, alkoxy, alkylthio, phenyl, phenoxy, phenylthio or acyloxy, R2 is -CO-alkyl, -CONH-alkyl, -SO2-alkyl, phenyl, -CO-C6H6, -CONH-C6H5 or -SO2-C6H5, R3 is alkyl, -NH-alkyl, -NHCONH-alkyl, phenyl, -NH-C6H5, -NHCONH-C6H5 or -NHCO-C6H5, R. is hydrogen, alkyl or phenyl, are easy to prepare and have a good coupling activity. The dyes obtained by these couplers exhibit a good light-stability.
式中 X 为-0-、-S-或-Se-,R1 为氢、卤素、烷基、烷氧基、烷硫基、苯基、苯氧基、苯硫基或酰氧基的吡唑酮色偶联剂、 R2 是-CO-烷基、-CONH-烷基、-SO2-烷基、苯基、-CO-C6H6、-CONH-C6H5 或-SO2-C6H5, R3 是烷基、-NH-烷基、-NHCONH-烷基、苯基、-NH-C6H5、-NHCONH-C6H5 或-NHCO-C6H5,R. 是氢、烷基或苯基,易于制备且具有良好的偶联活性。 由这些偶联剂得到的染料具有良好的光稳定性。