2-(4-Methoxyoxazolidinone-4-yl)thiazolidine t-butyl esters

Details 2-(4-Methoxyoxazolidinone-4-yl)thiazolidine t-butyl esters 2-(4-Methoxyoxazolidinone-4-yl)thiazolidine t-butyl esters

1975-04-14

1977-03-15

Gallagher, R. J.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

2602391, 424271, C07D41900

Patent

active

040124100

ABSTRACT:
6-acylamido-6-methoxypenicillanic acids are obtained by reacting a 6-acylamidopenicillanic acid with mercuric acetate in methanol to yield a methyl .alpha.-methoxypenicilloate. Esterification of the latter with isobutylene affords the methyl, t-butyl diester of the methoxypenicilloic acid which undergoes selective hydrolysis in base to provide the free .alpha.-carboxylic acid half t-butyl ester of the penicilloic acid. The latter on reaction with dicyclohexylcarbodiimide affords an oxazolone-thiazolidine of the formula ##STR1## WHICH WITH 98% FORMIC ACID PROVIDES A COMPOUND OF THE INVENTION.

REFERENCES:
patent: 2555008 (1951-05-01), Rolfson et al.

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