Process for purification of a cephalosporin derivative
US6825345B2 · kind B2 · utility
3Cited by
2References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 30, 2002 |
| Grant date | Nov 30, 2004 |
| Priority date | — |
| Expiry date | Nov 23, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D277/74
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for the purification of cefixime via a novel tert-octylamine salt of a cefixime intermediate of formula V which may be crystalline and which may be produced in a one-pot reaction from 7-amino-3-vinyl-ceph-3-em-4-carboxylic acid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.