A 7-(amic acid) cephalosporin is cleaved by conversion to the corresponding mixed anhydride and cleavage of the mixed anhydride to the corresponding 7-aminocephalosporin or to a corresponding 7-acylamidocephalosporin.
Process for cleaving an imido side chain from penicillins and
申请人:Eli Lilly and Company
公开号:US04005074A1
公开(公告)日:1977-01-25
The amic acid group of a 7-(amic acid) cephalosporin or 6-(amic acid) penicillin is cleaved by dehydration to the corresponding novel 7-isoimidocephalosporin or 6-isoimido-penicillin, and cleavage of the 7-isoimidocephalosporin or 6-isoimidopenicillin to the corresponding 7-aminocephalosporin or 6-aminopenicillin or to a corresponding 7-acylamidocephalosporin or 6-acylamidopenicillin.