Synthesis of ceftiofur intermediate
    3.
    发明申请
    Synthesis of ceftiofur intermediate 审中-公开
    头孢噻呋中间体的合成

    公开(公告)号:US20030135041A1

    公开(公告)日:2003-07-17

    申请号:US10035178

    申请日:2002-01-04

    IPC分类号: C07D501/14

    CPC分类号: C07D501/00

    摘要: The present invention provides an improved process for the preparation of 7-amino-3-null2-(furylcarbonyl)thiomethylnull-3-cephem-4-carboxylic acid represented by formula (I) 1 by the condensation of 7-amino cephalosporanic acid (7-ACA) represented by formula (II) with furyl-2-carbonylthiol represented by formula (III) using borontrifluoride as condensing agent in an organic solvent at a temperature range of 20null-50nullC.

    摘要翻译: 本发明提供了一种改进的制备由式(I)表示的7-氨基-3- [2-(呋喃基)硫代甲基] -3-头孢烯-4-羧酸的方法,其通过7-氨基头孢烷酸 7-ACA)与式(III)表示的呋喃-2-基羰基硫醇在有机溶剂中,使用三氟化硼作为缩合剂,在20°-50℃的温度范围内。