Penicillins and their preparation

Details Penicillins and their preparation Penicillins and their preparation

1977-02-02

1978-10-10

Jiles, Henry R.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260295T, 260295F, C07D23306

Patent

active

041196317

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##

REFERENCES:
kristinsson et al., Chem. Abstracts, vol. 76, 1972, paragraph 113200c.

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