Process for the preparation of cefodizime
    1.
    发明授权
    Process for the preparation of cefodizime 失效
    头孢地嗪的制备方法

    公开(公告)号:US4868295A

    公开(公告)日:1989-09-19

    申请号:US936187

    申请日:1986-12-01

    CPC分类号: C07D501/36 Y02P20/55

    摘要: A process for the preparation of cefodizime of the formula ##STR1## wherein (a) a compound of the formula II (ATS) ##STR2## wherein R.sub.1 represents hydrogen or an aminoprotective group and A represents a hydrogen atom or one equivalent of an alkali metal or alkaline earth metal, of ammonium or of an organic nitrogen base, is first reacted with a compound of the formula IIIR--SO.sub.2 Hal wherein R represents an optionally substituted alkyl, aryl or aralkyl radical and Hal represents a halogen atom, in an organic solvent and, if appropriate, in the presence of a base,(b) a compound of the formula I (TACS) ##STR3## in which A has the above meaning, is reacted with a silylating agent in an organic solvent and, if appropriate, in the presence of a base, and(c) the two products formed in (a) and (b) are reacted in their reaction solutions, and any protective group R.sub.1 present in the end product of the formula I is eliminated.

    摘要翻译: 制备式(II)的化合物其中(a)式II(ATS)的化合物其中R 1表示氢或氨基保护基,A表示氢原子或一个 首先与式IIIR-SO2Hal的化合物反应,其中R表示任选取代的烷基,芳基或芳烷基,Hal表示卤素原子 在有机溶剂中,如果合适,在碱的存在下,(b)式(I)所示的化合物(TACS),其中A具有上述含义,与甲硅烷基化剂在有机溶剂中反应 和(c)在(a)和(b)中形成的两种产物在其反应溶液中反应,并且存在于式I的最终产物中的任何保护基R1是 消除了