Silver halide photographic element comprising image dye-forming couplers

摘要

The invention provides a photographic element comprising a silver halide emulsion layer having associated therewith an image dye-forming coupler of formula (I): wherein X is H or a coupling-off group, R is H; or R, R1 and R2 are the same or different and are coupler-modifying functional groups (with the provisos that (a) the moiety N(R1)COR2 may not be a carbamate, ureido or imido and (b) R1 and R2 may not both be phenyl or substituted phenyl); or R1 and R2 taken together with the nitrogen atom and the carbonyl group form a 5-10 membered heterocyclic ring which may contain one or more further heteroatoms selected from N, O and S, said heterocyclic ring being unsubstituted or substituted with one or more coupler-modifying functional groups, with the proviso that the ring is not a cyclic carbamate, ureido or imido; and wherein the coupler forms a dye with a peak absorption less than 565 nm.