发明授权
US6130031A Photographic element containing a benzolylacetanilide DIR coupler 失效
含有苯甲酰乙酰苯胺DIR成色剂的摄影元件

Photographic element containing a benzolylacetanilide DIR coupler
摘要:
This invention comprises a photographic element, comprising a support bearing at least one silver halide emulsion and at least one benzoylacetanilide yellow dye-forming DIR coupler of structure I, below: ##STR1## wherein: each R.sub.1 is individually selected from the group consisting of halogen atoms and alkyl and alkoxy groups;m is 0, 1, 2 or 3;R.sub.2 is selected from the group consisting of halogen atoms and alkoxycarbonyl, aryloxycarbonyl, carbonamido, sulfonamido, sulfamoyl, alkylsulfonyl, arylsulfonyl, sulfonyloxy, acyloxy and cyano groups and each is in the para position or in either meta position relative to the NH group of the anilide;X is a hydrogen or halogen atom or an alkyl or alkoxy group;R.sub.3 is a halogen atom or an alkyl group and may be in the para position or either meta position relative to the NH group of the anilide;n is 0 or 1; andR.sub.4 is an alkyl group with 3 to 10 carbon atoms or a phenyl group.
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