Penicillins and their preparation
US4119631A · kind A · utility
1Cited by
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3Claims
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Assignee
Inventors
Key dates
| Filing date | Feb 2, 1977 |
| Grant date | Oct 10, 1978 |
| Priority date | — |
| Expiry date | Feb 2, 1997 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D499/00
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Carbamic acid lactones of the formula ##STR1## wherein Y is H or alkyl of 1-4 carbon atoms and R.sub.2 and R.sub.3 each are H or collectively with the carbon atoms to which they are attached form a first benzene or pyridine ring which is unsubstituted, substituted by up to two of alkyl, alkoxy of 1-4 carbon atoms, dialkylamino or halogen, wherein alkyl and alkoxy in each instance are of 1-4 carbon atoms, or is fused at two adjacent carbons to a second benzene or pyridine ring, are useful as intermediates for the production of penicillins by reaction with a penicillin of the formula ##STR2##
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.