| 摘要 |
PURPOSE:To obtain the titled material having improved coloring property and lightfastness by incorporating 1H-pyrro[1,2-b]-1,2,4-triazole coupler which carries out a coupling reaction with an oxidant of an aromatic primary amine color developing agent at the 5- or 7-position thereof to the titled material. CONSTITUTION:The titled material having good color reproducibility and excellent lightfastness is formed by using the coupler shown by formula I. In the formula, R1 and R2 are each hydrogen atom, alkyl, cycloalkyl, aryl, heterocyclic ring, hydroxy, cyano, sulfonyl, acylamino, sulfonamido, sulfamoyl, alkoxycarbonyl, aryloxycarbonyl, acyl, amino or carbamoyl group, R3 and R4 are each the same meaning to the org. groups of R1 and R2 except hydrogen atom, X is hydrogen atom or a group capable of releasing by the coupling reaction with the oxidant of the color developing agent. |
