Patent ID: 6190853
Filing Date: 2001-02-20
Classification: C07D,G03C,Y10S

Abstract:
A photographic element comprising a light sensitive silver halide emulsion layer containing an image-dye-forming coupler of formula (I) ##STR16##wherein:R is an alkyl, myl, alkoxy or heterocyclic group;R.sup.1 -R.sup.5 are hydrogen or an independently selected substituent, provided that R.sup.1 and R.sup.2, R.sup.2 and R.sup.3, R.sup.3 and R.sup.4 and R.sup.4 and R.sup.5 may represent fused cyclic groups;Ind is an indazole of formula (II) ##STR17##whereinInd is linked directly to the coupler via a ring nitrogen atom (N.sup.a or N.sup.b); andV, W, X, Y and Z are the same or different and are hydrogen or a substituent;provided that the sum of the Hammett's sigma para values of V, W, X, Y and Z is equal to or greater than 0.4.