Penicillin and cephalosporin intermediates
US3994883A · kind A · utility
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4Claims
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Key dates
| Filing date | Dec 21, 1973 |
| Grant date | Nov 30, 1976 |
| Priority date | — |
| Expiry date | Dec 21, 1993 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07F9/65613
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Novel penicillin and cephalosporin intermediates for the synthesis of 6-APA or 7-aminocephem compounds involving formation of a 6 or 7 phosphite amido compound and the conversion of such compound to a desired 6-APA or 7-aminocephem compound.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.