Color photographic elements containing yellow colored magenta dye forming masking couplers
AssigneeEastman Kodak Company
InventorsDaniel L. Kapp, Janet N. Younathan, Robert J. Ross, James P. Merrill
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Abstract
A multilayer silver halide color photographic element comprising a support bearing a light-sensitive silver halide emulsion layer and a non-diffusible yellow-colored magenta dye-forming masking coupler wherein the masking coupler is a 2'-hydroxy-5'-substituted-4-phenylazo-5-pyrazolone. The masking coupler has good coupling activity and desirable hues, and can be obtained in good yields by simple syntheses.
Claims7
A multilayer silver halide color photographic element comprising a support bearing a light-sensitive silver halide emulsion layer and a yellow-colored magenta dye-forming masking coupler wherein the masking coupler is a ballasted 5'-substituted-2'-hydroxy-4-phenylazo-5-pyrazolone represented by the structural formula:
- ##STR62## wherein:
- COUP is a 5-pyrazolone dye forming coupler having the azo group attached to its coupling position;
- R.sub.1 and R.sub.2 each independently represents a substituent with a Hammett sigma-para value of less than 0.05 selected from the group consisting of an alkyl group, an aryl group, an amino group, a ureido group, an alkoxy group and an aryloxy group, or together R.sub.1 and R.sub.2 represents an alkylene group with a Hammett sigma-para value of less than 0.05;
- and
- p is an integer of 0 to 3.
Dependencies are inferred from the claim text.