Process for the purification of substituted 4-amino-1,2,4-triazine-5-ones
US5440038A · kind A · utility
1Cited by
8References
10Claims
0Family size
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Key dates
| Filing date | Dec 7, 1993 |
| Grant date | Aug 8, 1995 |
| Priority date | — |
| Expiry date | Dec 7, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D253/075
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Substituted 4-amino-1,2,4-triazine-5-ones are purified to remove unwanted N-isomers by maintaining the crude product at a temperature of from about 55.degree. C. to about 70.degree. C. in the presence of a hydroxide, preferably an alkali metal hydroxide for at least 0.5 hour.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.