Photographic element containing improved acylacetamido yellow dye-forming coupler
US5998107A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 29, 1998 |
| Grant date | Dec 7, 1999 |
| Priority date | — |
| Expiry date | Apr 29, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C2200/33
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Disclosed is a photographic element comprises a silver halide emulsion layer having associated therewith a 3-indoloylacetanilide yellow dye-forming coupler of structure I, below: wherein: PA1 R.sub.1 is an alkyl or phenyl group; PA1 R.sub.2 is a phenyl, t-butyl, cyclohexyl or naphthyl group; PA1 X is a halogen atom or an alkoxy or alkyl group; PA1 each R.sub.3 is in the para position or either meta position relative to the anilino nitrogen and is individually selected from the group consisting of halogen atoms, and alkyl, phenyl, alkoxy, phenoxy, carbamoyl, sulfamoyl, carbonamido, sulfonamido, alkylsulfonyl, arylsulfonyl, alkoxycarbonyl, aryloxycarbonyl, acyloxy, sulfoxyl, sulfonyloxy, alkylthio, acyl and cyano groups; PA1 n is 1, 2 or 3; PA1 R.sub.4 is hydrogen or an alkyl group; PA1 R.sub.5 is hydrogen or an alkyl, alkylthio, alkoxycarbonyl or aryloxycarbonyl group; and PA1 each R.sub.6 is individually a halogen atom or an alkyl or alkoxy group and m is 0 to 4; provided that two substituents may join to form a ring. The element of the invention provides improved color forming ability, dye stability and other advantageous photographic properties.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.