Photographic dye-forming coupler, emulsion layer, element, and process
The invention provides a photographic light sensitive silver halide emulsion layer having associated therewith a pyrazolotriazole dye-forming coupler having the formula: wherein: R1 is a substituent bonded to the pyrazolotriazole nucleus by a fully substituted carbon atom; X is hydrogen or a couplin...
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Format: | Patent |
Sprache: | eng |
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Zusammenfassung: | The invention provides a photographic light sensitive silver halide emulsion layer having associated therewith a pyrazolotriazole dye-forming coupler having the formula: wherein: R1 is a substituent bonded to the pyrazolotriazole nucleus by a fully substituted carbon atom; X is hydrogen or a coupling-off group; R2, R3, R4, and R6 are independently hydrogen or substituent groups; R5 is selected from the group consisting of alkyl, alkoxy, aryl, and aryloxy groups; R7 is an alkyl group; and Y is a substituent group where m is 0 to 4. The invention also provides a coupler compound, a photographic element containing the emulsion layer of the invention, and an imaging process. |
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