Patent ID: 6010837
Filing Date: 2000-01-04
Classification: C07D,G03C

Abstract:
A photographic element comprising a silver halide emulsion layer having associated therewith an image dye-forming coupler of formula (I): ##STR11## wherein X is H or a coupling-off group, R is H or a coupler modifying group; R.sub.1 and R.sub.2 are the same or different and are coupler-modifying functional groups selected independently from alkyl, aryl or heterocyclic, each of which is unsubstituted or substituted with one or more coupler-modifying functional groups; or R.sub.1 and R.sub.2 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 provisos that (a) the moiety N(R.sub.1)COR.sub.2 may not be a carbamate, ureido or imido and (b) R.sub.1 and R.sub.2 may not both be phenyl or substituted phenyl); provided that R.sub.1 and R.sub.2 taken together with the nitrogen atom and the carbonyl group may 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 further proviso that the ring is not a cyclic carbonate, ureido or imido; and wherein the coupler forms a dye with a peak absorption less than 565 nm.