Process for preparing 3 amino 1, 2, 4-benzotriazine dioxide
US5672702A · kind A · utility
2Cited by
6References
7Claims
0Family size
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Inventor
Key dates
| Filing date | Dec 4, 1995 |
| Grant date | Sep 30, 1997 |
| Priority date | — |
| Expiry date | Dec 4, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D253/10
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Process of producing 3-amino-1,2,4-benzotriazine 1,4-dioxide by reacting benzofurazan-1 oxide with disodiumcyanamide under homogeneous conditions followed by allowing crystallization to occur in a buffered solution. In a preferred embodiment, the process comprises reacting benzofurazan-1 oxide with cyanamide and sodium hydroxide under homogeneous conditions followed by purification in a mixture of acetone and acetic acid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.