Epimerization of malonic acid esters
    5.
    发明公开
    Epimerization of malonic acid esters 失效
    丙二酸差向异构化。

    公开(公告)号:EP0098545A1

    公开(公告)日:1984-01-18

    申请号:EP83106437.3

    申请日:1983-07-01

    IPC分类号: C07D498/04

    CPC分类号: C07D505/00 Y02P20/55

    摘要: A compound represented by the formula (II) epimerizes by the action of a base and the product is precipitated for shift-
    wherein Ar is an optionally substituted aryl or heterocyclic group; Tet is an optionally substituted tetrazolyl group and B 1 and B 2 each is ing the equilibrium to yield the corresponding epimer represented by the formula (I):
    an ester forming group in the field of penicillin or cephalosporin chemistry.