Pentahalophenyl ester of cyanoacetic acid derivatives
US4508658A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 18, 1980 |
| Grant date | Apr 2, 1985 |
| Priority date | — |
| Expiry date | Jan 18, 2000 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C255/00
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Compounds of the formula ##STR1## wherein R.sup.1 is hydrogen or C.sub.1 to C.sub.6 alkyl; PA1 R.sup.2 is hydrogen, phenyl, thienyl, furyl, pyridyl, C.sub.1 to C.sub.6 alkyl, furylalkyl where the alkyl is C.sub.1 to C.sub.6, or phenylalkyl where the alkyl is C.sub.1 to C.sub.6 ; or PA1 R.sup.1 and R.sup.2 together form C.sub.1 to C.sub.4 alkylene, furyl-C.sub.1 to C.sub.4 alkylene or phenyl-C.sub.1 to C.sub.4 alkylene; and X is halo; or a pharmaceutically acceptable salt thereof, are disclosed as well as a process for the preparation thereof. The new compounds are intermediates useful in the production of penicillins and cephalosporins with antibiotic activity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.