Process for preparing cephalosporin esters in the presence of li

Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...

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544 26, 544 30, C07D50104

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active

041593723

ABSTRACT:
A process for preparing a cephalosporin ester which comprises subjecting an organic halide or an alcohol to reaction with a cephalosporin acid, a cephalosporin acid halide or a salt thereof in the presence of liquid sulfur dioxide.

REFERENCES:
patent: 3928333 (1975-12-01), Wheeler
patent: 4115646 (1978-09-01), Bently et al.
Flynn, Ed., "Cephalosporins & Penicillins", (1972) pp. 147-151, 172-176.
Cocker et al., J. Chem. Soc., 1966, 1142.

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