Photographic element containing a stable aryloxypyrazolone coupler and process employing same

Abstract

Disclosed is a photographic element comprising a light-sensitive silver halide emulsion layer having associated therewith a coupler based on a 1-aryl-3-arylpyrazol-5-one or a 1-aryl-3-alkylpyrazol-5-one ring and represented by formula I: ##STR1## wherein: X represents an aryl, alkyl, alkylamino, or arylamino group; Y can be carbon or sulfur; in is 1 when Y is carbon and 2 when Y is sulfur; R represents a halogen or an alkyl group; and o is 0 to 4, provided that two or more R substituents may join to form one or more additional rings; Z is either (a) an aryl group represented as Ar.sup.3 Q(n) where Q represents n independently selected substituents bonded to the Ar.sup.3 ring; and n is 0 to 5, provided that two or more Q substituents may join to form one or more additional rings or (b) an alkyl group; OAr.sup.4 is an aryloxy group; and P represents p independently selected substituents bonded to the OAr.sup.4 aryloxy ring, provided that P may not be a nitro group ortho to the oxygen atom linking the aryloxy group to the 4-position of the pyrazolone ring; and p is 0 to 5, provided that two or more P substituents may join to form one or more additional rings; provided that X and an R group may join to form an additional ring.

Dependencies are inferred from the claim text.