Oxacephalosporins
US4369314A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 19, 1981 |
| Grant date | Jan 18, 1983 |
| Priority date | — |
| Expiry date | Nov 19, 2001 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61P31/04
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
New oxacephalosporin derivative of the general formula: ##STR1## in which R.sub.1 is a protective radical, R.sub.2 is either a radical of the general formula: ##STR2## [in which R.sub.5 is hydrogen, alkyl, vinyl, protected carboxyalkyl or a protective radical and R.sub.6 is a protective radical] or an .alpha.-carboxyarylacetyl radical and R" is hydrogen or methoxy in the 7.alpha.-position, or alternatively R.sub.2 is a protective radical and R" is either hydrogen or methoxy in the 7.alpha.-position or hydrogen in the 7.beta.-position, and R.sub.3 and R.sub.4 are optionally substituted alkyl, or phenyl, or form a heterocyclic ring with the nitrogen atom, their E and Z forms and mixtures thereof and also their preparation. These new products are useful as intermediates for the preparation of biologically active oxacephalosporins.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.