Cephalosporin intermediate products
US5585485A · kind A · utility
3Cited by
2References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 6, 1995 |
| Grant date | Dec 17, 1996 |
| Priority date | — |
| Expiry date | Jun 6, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D417/12
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A cephalosporin intermediate of the formula ##STR1## where R.sub.3 is carboxyl, carboxylate, or a carboxylic acid ester group and, PA1 R.sub.8 and R.sub.9 are each independently hydrogen, halogen, PA1 (C.sub.1-4) alkyl, hydroxy, carboxamido, PA1 (C.sub.1-4) alkoxycarbonyl, amino, PA1 mono- (C.sub.1-4) alkylamino, di- (C.sub.1-4) alkylamino, or PA1 together are a 5 or 6-membered carbocyclic ring or an alkali metal, alkaline earth metal, or acid addition salt thereof. Valuable cephalosporin antibiotics can be produced from the cephalosporin intermediate products of formula I.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.