Process for the preparation of 1,1-dioxo-7-substituted cephems
US4992541A · kind A · utility
7Cited by
1References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 1, 1989 |
| Grant date | Feb 12, 1991 |
| Priority date | — |
| Expiry date | Aug 1, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D501/00
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The present invention relates to an improved process for the preparation of the compounds of formula (I) ##STR1## which involve the direct oxidation without N-protection of the compound of the formula (II) ##STR2##
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.