Process for preparing cephalosporin esters in the presence of liquid
申请人:Meiji Seika Kaisha Ltd.
公开号:US04159372A1
公开(公告)日:1979-06-26
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.