Photographic element containing improved coupler set
AssigneeEastman Kodak Company
InventorsJames Lawrence Edwards, Philip T. S. Lau, Stanley Wray Cowan
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Abstract
The invention provides a photographic element comprising a red light sensitive silver halide emulsion layer having associated therewith a cyan dye forming coupler having Formula (I) and a green light sensitive silver halide emulsion layer having associated therewith a magenta dye forming coupler having formula IIA or IIB: ##STR1## wherein the substituents are as defined herein.
Claims24
A photographic element comprising a red light sensitive silver halide emulsion layer having associated therewith a cyan dye forming coupler having Formula (I) and a green light sensitive silver halide emulsion layer having associated therewith a magenta dye forming coupler having formula IIA or IIB:
- wherein
- R.sub.1 represents hydrogen or an alkyl group selected from the group consisting of methyl, ethyl, n-propyl, isopropyl, and butyl groups;
- R.sub.2 represents an aryl group substituted by a substituent selected from the group consisting of cyano, halogen, carbonyl, alkoxy, aryloxy, oxysulfonyl, sulfoxide, thio, sulfamoyl, carboxy, sulfonamido, carbonamido, and carbamoyl groups;
- n represents 1, 2, or 3;
- each X is located at a position of the phenyl ring meta or para to the sulfonyl group and is independently selected from the group consisting of alkyl alkenyl, alkoxy, aryloxy, acyloxy, acylamino, sulfonyloxy, sulfamoylamino, sulfonamido, ureido, oxycarbonyl, oxycarbonylamino, and carbamoyl groups;
- and
- Z represents a hydrogen atom or a group which can be split off by the reaction of the coupler with an oxidized color developing agent;
- and ##STR18## wherein Z represents hydrogen or a coupling-off group bonded to the coupling site;
- and R.sup.1d and R.sup.1f represent a hydrogen atom, or a substituent group.
Dependencies are inferred from the claim text.