Dye-forming coupler, silver halide photographic light-sensitive material and azomethine dye compound
US7193080B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 7, 2003 |
| Grant date | Mar 20, 2007 |
| Priority date | — |
| Expiry date | Oct 7, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C7/36
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A dye-forming coupler and compound of formula (I):wherein Q represents a residue that forms, together with —N—C═N—, a nitrogen-containing 6-membered ring; RA represents an aryl, heterocyclic, or —(R1)r—(R4)m group; X represents an aryl group; Y represents a hydrogen atom, or a group capable of being split-off upon a coupling reaction with an oxidized product of a developing agent:wherein,when RA represents an —(R1)r—(R4)m group, R1 represents a methylene group, a methine group, or a carbon atom; r is 1 to 30; R4 represents a substituent except for a hydrogen atom; m is 1 to 30; and the —(R1)r—(R4)m group does not represent a straight-chain alkyl group.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.