Patent ID: 6365334
Filing Date: 2002-04-02
Classification: G03C

Abstract:
A photographic element having a layer comprising a silver halide emulsion, and a 1-aryl-4-aryloxy-2-pyrazolin-5-one magenta dye forming coupler which has a sulfoxide group, wherein the magenta dye forming coupler is of formula Ia or Ib: wherein:R1 is an aryl group; R2 is an alkyl group, an acylamino group, an anilino group, a carbamoyl group or an alkoxy group: R3 is a substituent; and n is an integer from 0 to 4; at least one of R1, R2 or R3 carrying the sulfoxide group; the substituents on the sulfoxide group being selected from an alkyl group; an alkylene group; an alkenyl group; or a substituted or unsubtituted aryl wherin the subtituents are selected from an alkyl, alkoxy, aryloxy, alkoxycaronyl, arylcarbonyl, acyloxy, carbonamido, carbamoyl, sulfonamido, or sulfamoyl group, or halogen atoms; or the substituents may together form a ring including the sulfur atom; the total number of carbon atoms on the substituents together being at least 12.