Process for the preparation of a cephalosporin antibiotic
    1.
    发明授权
    Process for the preparation of a cephalosporin antibiotic 失效
    制备头孢菌素抗生素的方法

    公开(公告)号:US07098329B2

    公开(公告)日:2006-08-29

    申请号:US10867723

    申请日:2004-06-16

    IPC分类号: C07D501/36

    CPC分类号: C07D501/00

    摘要: An improved process for the preparation of ceftriaxone sodium comprising the steps of: i) reacting the 3-cephem derivative of formula (II)  with halo acid derivative of formula (III)  wherein X represents halogen and Y represent halogen in the presence of silylating agent and methylene chloride at −25 to 10° C., to produce (IV), ii) quenching the reaction by pouring the reaction mixture into water or in a aqueous solution of sodium carbonate, iii) preparing sodium salt solution of (IV) by adding sodium carbonate and separating the organic layer, iv) cyclizing the sodium salt of (IV) in the aqueous solution with thiourea at a temperature in the range of 0 to 30° C., v) adjusting the pH to 1.5 to 2.5 to precipitate the ceftriaxone free acid, vi) converting the ceftriaxone free acid to sodium salt using sodium-2-ethyl hexanoate in water and vii) precipitating and isolating the ceftriaxone sodium.

    摘要翻译: 一种用于制备头孢曲松钠的改进方法,包括以下步骤:i)使式(II)的3-头孢烯衍生物与式(III)的卤酸衍生物反应,其中X代表卤素,Y代表甲硅烷基化剂存在下的卤素 和二氯甲烷在-25至10℃下反应,以产生(Ⅳ),ⅱ)通过将反应混合物倒入水中或在碳酸钠水溶液中淬灭反应,ⅲ)制备(Ⅳ)的钠盐溶液 加入碳酸钠并分离有机层,iv)在0至30℃的温度范围内,用硫脲环化水溶液中的(Ⅳ)的钠盐,v)将pH调节至1.5至2.5以沉淀 头孢曲松游离酸,vi)使用2-乙基己酸钠在水中将头孢曲松游离酸转化为钠盐,和vii)沉淀并分离头孢曲松钠。

    Process for the preparation of a cephalosporin antibiotic
    2.
    发明申请
    Process for the preparation of a cephalosporin antibiotic 失效
    制备头孢菌素抗生素的方法

    公开(公告)号:US20050027118A1

    公开(公告)日:2005-02-03

    申请号:US10867723

    申请日:2004-06-16

    CPC分类号: C07D501/00

    摘要: An improved process for the preparation of ceftriaxone sodium comprising the steps of: i) reacting the 3-cephem derivative of formula (II)  with halo acid derivative of formula (III)  wherein X represents halogen and Y represent halogen in the presence of silylating agent and methylene chloride at −25 to 10° C., to produce (IV), ii) quenching the reaction by pouring the reaction mixture into water or in a aqueous solution of sodium carbonate, iii) preparing sodium salt solution of (IV) by adding sodium carbonate and separating the organic layer, iv) cyclizing the sodium salt of (IV) in the aqueous solution with thiourea at a temperature in the range of 0 to 30° C., v) adjusting the pH to 1.5 to 2.5 to precipitate the ceftriaxone free acid, vi) converting the ceftriaxone free acid to sodium salt using sodium-2-ethyl hexanoate in water and vii) precipitating and isolating the ceftriaxone sodium.

    摘要翻译: 一种用于制备头孢曲松钠的改进方法,包括以下步骤:i)使式(II)的3-头孢烯衍生物与式(III)的卤酸衍生物反应,其中X代表卤素,Y代表甲硅烷基化剂存在下的卤素 和二氯甲烷在-25至10℃下反应,以产生(Ⅳ),ⅱ)通过将反应混合物倒入水中或在碳酸钠水溶液中淬灭反应,ⅲ)制备(Ⅳ)的钠盐溶液 加入碳酸钠并分离有机层,iv)在0至30℃的温度范围内,用硫脲环化水溶液中的(Ⅳ)的钠盐,v)将pH调节至1.5至2.5以沉淀 头孢曲松游离酸,vi)使用2-乙基己酸钠在水中将头孢曲松游离酸转化为钠盐,和vii)沉淀并分离头孢曲松钠。