Silver halide color photographic light-sensitive material, pyrrolotriazole compound, and dye-forming compound
US6773875B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 27, 2001 |
| Grant date | Aug 10, 2004 |
| Priority date | — |
| Expiry date | Sep 27, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C7/30529
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Pyrrolotriazole compounds of the formula (I) and silver halide color photographic light-sensitive materials containing the compound as a cyan coupler, are disclosed: wherein R1 and R2 each independently are an alkyl, cycloalkyl, alkenyl, aryl or heterocyclic group, or R1 and R2 may bond together to form a 5- or 6-membered nitrogen-containing heterocycle; R3 is an alkyl, cycloalkyl or alkenyl group; R5 is an alkyl or aryl group; R4, R6, R7 and R8 each independently are a hydrogen atom or a substituent, with the proviso that at least one of R4, R6, R7 and R8 is a substituent, and that two groups of R4 to R8, which adjoin each other, do not bond together to form any ring.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.