Process for the preparation of pyrazine compounds
US6803464B2 · kind B2 · utility
34Cited by
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11Claims
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Key dates
| Filing date | Nov 5, 2002 |
| Grant date | Oct 12, 2004 |
| Priority date | — |
| Expiry date | Jan 15, 2023 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D241/20
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The present invention relates to a process for the preparation of both the phenyl pyrazine derivative 2,6-diamino-3-(2,3,5-trichlorophenyl)pyrazine and an intermediate in the synthesis of 2,6-diamino-3-(2,3,5-trichlorophenyl)pyrazine, 2-{[Cyano-(2,3,5-trichlorophenyl)-methyl]-amino}-acetamidine or a salt thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.