1H-pyrrolo-[1,2-b][1,2,4,]triazole compound and its synthetic intermediate, and method of preparing a 1H-1,2,4-triazole-5-yl-acetic acid ester compound
US6384219B1 · kind B1 · utility
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12Claims
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Key dates
| Filing date | Jan 7, 1998 |
| Grant date | May 7, 2002 |
| Priority date | — |
| Expiry date | Jan 7, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C7/383
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
There is disclosed a 1H-pyrrolo-[1,2-b][1,2,4]triazole compound represented by formula (I): wherein R is an alkyl group; R1, R2, R3, R1′, R2′, and R3′ each are a hydrogen atom or an alkyl group; R1 and R2, and R1′ and R2′ may bond together to form a ring, respectively; R4 is a hydrogen atom or an alkyl group, and X is heterocyclic group, a substituted amino group, or an aryl group. The compound is useful as a photographic cyan coupler. There is also disclosed synthetic intermediates of the compound and a production method of the intermediates.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.