Patent ID: 7365199

Claim:
A dye-forming coupler represented by formula (I): wherein Q represents —C(—R 2 )═C(—R 3 )—CO—, in which R 2 and R 3 bond with each other, to form, together with the —C═C— moiety, a 5- to 7-membered ring; R A represents an alkyl group having at least 7 carbon atoms, which may be substituted with another substituent, or an -L-R 1 group; X represents an aryl group; Y represents a hydrogen atom, or a group that is capable of being split-off upon a coupling reaction with an oxidized product of a developing agent; wherein when R A represents said -L-R 1 group, L represents a divalent linking group selected from the group consisting of —O—, —N(R a )—, —S—, —SO 2 —, —SO— and —C(═O)— and combinations thereof; and R 1 is selected from the group consisting of an alkyl group, a cycloalkyl group, a bicycloalkyl group, an alkenyl group, a cycloalkenyl group, a bicycloalkenyl group, an alkynyl group, an aryl group, a heterocyclic group, a cyano group, a carboxyl group, an alkoxy group, an aryloxy group, a silyloxy group, a heterocyclic oxy group, an acyloxy group, a carbamoyloxy group, an alkoxycarbonyloxy group, an aryloxycarbonyloxy group, an amino group, an alkylamino group, an anilino group, an acylamino group, an aminocarbonylamino group, an alkoxycarbonylamino group, an aryloxycarbonylamino group, a sulfamoylamino group, an alkylsulfonylamino group, an arylsulfonylamino group, a mercapto group, an alkylthio group, an arylthio group, a heterocyclic thio group, a sulfamoyl group, a sulfo group, an alkylsulfinyl group, an arylsulfinyl group, an alkylsulfonyl group, an arylsulfonyl group, an acyl group, an aryloxycarbonyl group, an alkoxycarbonyl group, a carbamoyl group, an arylazo group, a heterocyclic azo group, an imido group, a phosphino group, a phosphinyl group, a phosphinyloxy group, a phosphinylamino group and a silyl group; wherein R a represents a hydrogen atom or is selected from the group enumerated for R 1 .