Process for the production of 4,5-dichloro-6-ethylpyrimidine
US4977264A · kind A · utility
4Cited by
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6Claims
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Key dates
| Filing date | Nov 8, 1989 |
| Grant date | Dec 11, 1990 |
| Priority date | — |
| Expiry date | Nov 8, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D239/30
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
2-chloro-3-oxopentanoic acid alkyl ester is condensed with the addition of bases with formamidinium salts into 5-chloro-6-ethyl-4-hydroxypyrimidine. The latter is converted with phosphoryl chloride into 4,5-dichloro-6-ethylpyrimidine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.