Process for preparing cephalosporin esters in the presence of liquid sulfur dioxide
US4159372A · kind A · utility
0Cited by
2References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 6, 1978 |
| Grant date | Jun 26, 1979 |
| Priority date | — |
| Expiry date | Mar 6, 1998 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D501/04
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for preparing a cephalosporin ester which comprises subjecting an organic halide or an alcohol to reaction with a cephalosporin acid, a cephalosporin acid halide or a salt thereof in the presence of liquid sulfur dioxide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.