Process for the production of 2-bromo-3-cyano-4,6-diaminopyridine
US4189584A · kind A · utility
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6Claims
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Key dates
| Filing date | Mar 6, 1978 |
| Grant date | Feb 19, 1980 |
| Priority date | — |
| Expiry date | Mar 6, 1998 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D213/85
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for the production of 2-bromo-3-cyano-4,6-diaminopyridine by cyclization of malodinitrile with hydrogen bromide, which comprises reacting malodinitrile in lower aliphatic hydrogenated hydrocarbons with hydrogen bromide used in an excess of 1 to 10% above the stoichiometric amount at temperatures of -10.degree. C. to +30.degree. C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.