2-Amino-pyridyl nitromethylketones and 2-amino-phenyl nitromethylketones
US4117137A · kind A · utility
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45Claims
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Key dates
| Filing date | Jul 6, 1977 |
| Grant date | Sep 26, 1978 |
| Priority date | — |
| Expiry date | Jul 6, 1997 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D213/74
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
2-Amino-3-pyridyl (or phenyl) nitromethylketones are prepared eg by reacting a 3,4-dihydro-1,3-dioxo-1H-pyrido [2,3-d][1,3]oxazine (a 3-azaisatoic anhydride) with the carbanion resulting from the reaction of nitromethane with a porton abstracting agent. The compounds are useful as anti-allergic agents.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.