3-Substituted methyl-7-acylamino-7-methoxy-2-cephem-4-carboxylic acid and its esters
US3987040A · kind A · utility
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6Claims
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Key dates
| Filing date | Dec 5, 1974 |
| Grant date | Oct 19, 1976 |
| Priority date | — |
| Expiry date | Dec 5, 1994 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D501/60
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Process for preparing an ester of 3-substituted methyl-7-acylamido-7-methoxy(or hydrogen)-2-cephem-4-carboxylic acid and its corresponding sulfoxide by treating an ester of 3-carbamoyloxymethyl(or 3-lower alkanoyloxymethyl)-7-acylamido-7-methoxy(or hydrogen)-2-cephem-4-carboxyli c acid with a hydrohalic acid or another compound containing an active hydrogen and then with an oxidizing agent. The products obtained are useful as intermediates in the preparation of antibiotics.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.