Photochemical conversion of cephalosporins, 1-carba(1-dethia)cephalosporins and 1-oxa(1-dethia)cephalosporins
US4888100A · kind A · utility
2Cited by
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19Claims
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Key dates
| Filing date | Mar 15, 1989 |
| Grant date | Dec 19, 1989 |
| Priority date | — |
| Expiry date | Mar 15, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D505/00
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for photochemically converting 3-exomethylene cephams (or 1-carba(1-dethia)cephams or and 1-oxa(1-dethia)cephams) from the corresponding 3-alkyl-3-cephem (or 1-carba(1-dethia)cephem or 1-oxa(1-dethia)cephem) is provided. Further provided are 3-cephams useful as intermediates to 3-cephem compounds.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.