Process for producing cephalosporins
    22.
    发明授权
    Process for producing cephalosporins 失效
    生产头孢菌素的方法

    公开(公告)号:US3978053A

    公开(公告)日:1976-08-31

    申请号:US528313

    申请日:1974-11-29

    CPC分类号: C07D499/00 Y02P20/55

    摘要: A process for producing a compound of the formula (I) ##SPC1##wherein R.sub.2 is a hydrogen atom or an ester protective group, which is useful as a precursor for the production of cephalosporin derivatives, comprising reacting a phosphoramide derivative of cephalosporin of the formula (II) ##SPC2##wherein R.sub.1 is a lower alkyl group and R.sub.2 is as defined above, with a phosphorus acid. A further embodiment includes preparing the phosphoramide derivative of cephalosporin of the formula (II) by reactng a compound of the formula (III) ##SPC3##wherein R.sub.1 and R.sub.2 are as defined above, with an acid compound.

    摘要翻译: 一种制备式(I)化合物的方法,其中R2是氢原子或酯保护基,其可用作产生头孢菌素衍生物的前体,包括使式(II)的头孢菌素的磷酰胺衍生物, 其中R1是低级烷基,R2如上定义,与磷酸反应。 另一个实施方案包括通过将其中R 1和R 2如上定义的式(III)化合物与酸化合物反应来制备式(II)的头孢菌素的磷酰胺衍生物。