Nitro group-containing ether compound and method for producing same
US8524940B2 · kind B2 · utility
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Key dates
| Filing date | Dec 6, 2011 |
| Grant date | Sep 3, 2013 |
| Priority date | — |
| Expiry date | Jan 4, 2032 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C2601/16
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
It is possible to produce oseltamivir safely and stably in large quantities by using as a starting material tartaric acid, mannitol or arabinose, via dihydroxyhexenoic acid ester of the formula (4c):(wherein R1, R2 and R6 are same or different and are each alkyl, aryl, substituted aryl, aralkyl, substituted aralkyl or aromatic heterocyclic group, and R1 and R2 are not methyl simultaneously).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.