Process for the preparation of phosphorus derivatives of secondary ammonium salts of penam and cephem compounds
US4082745A · kind A · utility
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6Claims
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Key dates
| Filing date | Mar 22, 1976 |
| Grant date | Apr 4, 1978 |
| Priority date | — |
| Expiry date | Mar 22, 1996 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07F9/65613
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
An improvement in the conversion of penam and cephem compounds to secondary ammonium salts of phosphite amides thereof by reacting as follows: ##STR1## wherein --R, is the non-reacting balance of the penam or cephem compound and ##STR2## ARE NON-REACTING SUBSTITUENTS. Catalytic amounts of H--N< or the hydrogenhalide thereof may be present in the reaction medium.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.