| abstract |
IN WHICH R1 represents an alkyl radical; R2 represents an alkoxy radical, an alkylthio radical, a secondary or tertiary alkylamino group, a halogen, an alkyl radical, arylthio; R3 represents a substituent in the 4- or 5-position, which is: sulfonamide, carbamoyl, acylamino, an alkylsulfonyl; R4 represents hydrogen, an alkyl or alkoxy radical, halogen, sulfonamide or carbamoyl alkyl or alkylsulfonyl. A light-sensitive photographic material containing in a silver halide emulsion layer a yellow coupler of the following formula: |