Patent ID: 6566034
Filing Date: 2003-05-20
Classification: C07C,C07D,G03C

Abstract:
A photographic material comprising a support and at least one silver halide emulsion layer characterized in that said photographic material contains a hydrazine compound represented by following general formula (I): wherein:R1 is represented by: â€ƒwherein: R11 represents any substituent, m represents an integer from 0 to 4, Lâ€² represents a divalent linking group, Q represents a cationic aromatic nitrogen containing heterocycle, R2 is selected from the group consisting of a substituted or unsubstituted, saturated or unsaturated aliphatic chain, a substituted or unsubstituted aryl or heteroaryl, with the proviso that R2 comprises a redox moiety, capable of developing an exposed silver halide crystal, X is selected from the group consisting of â€”COâ€”, â€”SOâ€”, â€”SO2â€”, â€”COâ€”COâ€”, â€”P(O)R3, â€”C(&boxH;Nâ€”R4), wherein each of R3 and R4 is independently selected from hydrogen, a substituted or unsubstituted, saturated or unsaturated aliphatic chain, a substituted or unsubstituted aryl or heteroaryl, OR5, NR6R7; each of R5 to R7 is selected from the group consisting of hydrogen, a substituted or unsubstituted, saturated or unsaturated aliphatic chain, and a substituted or unsubstituted aryl or heteroaryl, L is a divalent linking group, n=0 or 1, each of A and Aâ€² independendently represents a hydrogen, a group capable of yielding a hydrogen under alkaline photographic processing conditions or a SO2R8-group provided that if A is SO2R8 Aâ€² is a hydrogen and vice versa; R8 is selected from the group consisting of a substituted or unsubstituted, saturated or unsaturated aliphatic chain, a substituted or unsubstituted aryl or heteroaryl.