Process for the preparation of the cephalosporanic acid derivative
US3935198A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 19, 1973 |
| Grant date | Jan 27, 1976 |
| Priority date | — |
| Expiry date | Dec 19, 1993 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D501/10
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for the preparation of cephalosporanic acid derivatives represented by the formula ##SPC1## Wherein R.sub.1 and R.sub.2, which may be the same or different, each represents a univalent group other than a hydrogen atom, said R.sub.1 and R.sub.2 may be combined to form a divalent group and A represents a divalent group represented by the formulae ##SPC2## Wherein R.sub.3 represents a hydrogen atom or a group which does not contribute to the reaction, which comprises heating a penicillin sulfoxide derivative represented by the formula ##SPC3## Wherein R.sub.1, R.sub.2 and R.sub.3 are as defined above. The cephalosporanic acid derivatives prepared by the process of this invention are useful as a starting material for the preparation of antibacterials.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.