Process for the production of cephalosporin derivatives
    2.
    发明授权
    Process for the production of cephalosporin derivatives 失效
    生产头孢菌素衍生物的方法

    公开(公告)号:US4954624A

    公开(公告)日:1990-09-04

    申请号:US385591

    申请日:1989-06-29

    CPC分类号: C07D501/46 C07D501/04

    摘要: New process for the production of the pentahydrate of ceftazidime of formula ##STR1## characterized in that the ester group of the compound of formula ##STR2## or an acid addition salt thereof, is cleaved by the sole use of aqueous hydrochloric acid, and the resulting ceftazidime is either crystallized directly from the reaction mixture as the pentahydrate by adding a base, or first of all the dihydrochloride of the ceftazidime is isolated by adding acetone and/or ethanol or another anti-solvent which is miscible with water, and this is converted into the pentahydrate by known methods.

    摘要翻译: 用于生产式(III)的头孢他啶的五水合物的新方法,其特征在于式Ia化合物或其酸加成盐的酯基被单独使用 的盐酸水溶液,所得到的头孢他啶直接从反应混合物中以五水合物结晶,通过加入碱,或首先通过加入丙酮和/或乙醇或另一种反溶剂来分离头孢他啶的二盐酸盐, 与水混溶,通过已知方法将其转化为五水合物。

    Method for preparing crystalline cephalosporin derivative
    4.
    发明授权
    Method for preparing crystalline cephalosporin derivative 失效
    制备结晶性头孢菌素衍生物的方法

    公开(公告)号:US4826972A

    公开(公告)日:1989-05-02

    申请号:US57552

    申请日:1987-06-03

    CPC分类号: C07D501/46

    摘要: The invention provides crystalline (6R, 7R)-7-[[2-(2-Amino-4-thiazolyl)-(Z)-2-(1-diphenylmethoxycarbonyl-1-methylethoxy)imino ]acetamido]-3-(1-pyridiniummethyl)-3-cephem-4-carboxylate and a process for its production.

    摘要翻译: 本发明提供结晶(6R,7R)-7 - [[2-(2-氨基-4-噻唑基) - (Z)-2-(1-二苯基甲氧基羰基-1-甲基乙氧基)亚氨基]乙酰氨基] 1-吡啶鎓甲基)-3-头孢烯-4-羧酸酯及其制备方法。