Process for preparing 3'bromo-desacetoxycephalosporanic acid sul

Details Process for preparing 3'bromo-desacetoxycephalosporanic acid sul Process for preparing 3'bromo-desacetoxycephalosporanic acid sul

1981-02-13

1982-12-28

Rizzo, Nicholas S.

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

544 30, 544 24, 424246, 544 22, 544 26, C07D50104, A61K 31545

Patent

active

043663150

ABSTRACT:
An improved process for the preparation of 3'-bromo-desacetoxycephalosphoranic acid sulfoxide compounds comprising protecting the 4-carboxy group of a 3'-unsubstituted cephalosporanic acid sulfoxide by silylating in an inert anhydrous organic solvent and brominating the silylated compound in situ which 3'-bromo compounds are valuable intermediates for the preparation of therapeutically useful cephalosporanic acid compounds.

REFERENCES:
patent: 3922268 (1978-11-01), Murphy et al.
patent: 4182870 (1970-01-01), Bruynes et al.
patent: 4223135 (1980-09-01), Walker et al.

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