| abstract |
Compounds having a structure corresponding to the following formula. <IMAGE> wherein G represents OH or a precursor group which is unstable to alkali, X represents a substituent which cannot be split off, Y represents -O-alkyl, -SO2-NR1-R2, -CO-NR1-R2, -NR1-CO-R3, or -NR1-SO2-R3, R1 represents H or alkyl, R2 represents alkyl, aralkyl or aryl, R3 represents alkoxy, aroxy, alkylamino, arylamino or R2, Z represents H, alkyl, alkoxy, halogen or acylamino and n represents 1 or 2 are suitable for improving the stability to light of image dyes produced from photographic couplers, in particular yellow couplers. |