Cephalosporins
US6313305A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 21, 1997 |
| Grant date | Nov 6, 2001 |
| Priority date | — |
| Expiry date | Jul 21, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/55
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A compound having the formula selected from the group consisting of ##STR1## wherein either R.sub.3p and R.sub.4p are identical and selected from the group consisting of --OH, protected --OH and acyloxy of 1 to 8 carbon atoms, R.sub.2p is selected from the group consisting of --CN, --F, Br and I and R.sub.1p and R.sub.5p are hydrogen or R.sub.5p is --F and R.sub.1p and R.sub.2p are hydrogen or R.sub.1p and R.sub.2p are F and R.sub.5p is hydrogen, or R.sub.4p and R.sub.5p are identical and selected from the group consisting of --OH, protected --OH and acyloxy of 1 to 8 carbon atoms, R.sub.3p is selected from the group consisting of F and --CN and R.sub.1p and R.sub.2p are hydrogen, R.sub.8 is hydrogen or an amine protective group and R.sub.10 is the remainder in which the hydroxy or amino are protected ##STR2## wherein R'.sub.1 is selected from the group consisting of alkyl of 1 to 4 carbon atoms, --CN, carboxy and alkoxy carbonyl of 1 to 4 carbon atoms.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.