Process for preparing 6-aminopenicillanic acid, 7-aminocephalosporanic
申请人:Gruppo Lepetit S.p.A.
公开号:US04021426A1
公开(公告)日:1977-05-03
A process for preparing 6-APA and 7-ACA and derivatives therefore is disclosed wherein a penicillin or cephalosporin substrate is reacted with a molar excess of an oxalyl halide of the formula halCOCOhal whereby the COOM group of the substrate, wherein M represents hydrogen, metal or ammonium cations, is transformed into the group COOCOCOhal.