Process for producing an N-alkoxycarbonyl-N-cyanoethyl amino acid alkyl ester
    3.
    发明公开
    Process for producing an N-alkoxycarbonyl-N-cyanoethyl amino acid alkyl ester 审中-公开
    Verfahren zur Herstellung eine N-烷氧基羰基-N-氰基乙基氨基烷基酯

    公开(公告)号:EP1000931A1

    公开(公告)日:2000-05-17

    申请号:EP99308983.8

    申请日:1999-11-11

    IPC分类号: C07C271/22

    CPC分类号: C07C269/04 C07C271/22

    摘要: An N-alkoxycarbonyl-N-cyanoethyl amino acid alkyl ester is produced at a high yield by reacting a mineral acid salt of amino acid alkyl ester with acrylonitrile in an alcohol medium in the presence of an inorganic base to form an N-cyanoethyl amino acid alkyl ester and then reacting the N-cyanoethyl amino acid alkyl ester with a dialkyl dicarbonate.

    摘要翻译: 通过在无机碱的存在下,在醇介质中使氨基酸烷基酯的无机酸盐与丙烯腈反应,以高收率产生N-烷氧基羰基-N-氰基乙基氨基酸烷基酯,形成N-氰基乙基氨基酸 然后使N-氰基乙基氨基酸烷基酯与二碳酸二烷基酯反应。

    Process for producing di-tert-butyl dicarbonate
    4.
    发明公开
    Process for producing di-tert-butyl dicarbonate 有权
    Verfahren zum Herstellen von di-tert-butyl Dicarbonat

    公开(公告)号:EP0915078A1

    公开(公告)日:1999-05-12

    申请号:EP98309147.1

    申请日:1998-11-09

    IPC分类号: C07C68/04 C07C68/06 C07C69/96

    摘要: An industrially advantageous process for producing di-tert-butyl bicarbonate from tert-butyl alcohol and an alkali metal comprises continuously carrying out the following steps:

    (A) reacting tert-butyl alcohol with sodium to form sodium tert-butoxide;
    (B) reacting the sodium tert-butoxide with carbon dioxide to form mono-tert-butyl sodium carbonate; and
    (C) reacting the mono-tert-butyl sodium carbonate with an aromatic sulfonyl halide such as p-toluenesulfonyl chloride in the presence of a tertiary amine such as N,N,N',N'-tetramethylethylenediamine,

    without isolating an intermediate in the middle of each reaction stage.

    摘要翻译: 从叔丁醇和碱金属生产二叔丁基碳酸氢盐的工业上有利的方法包括连续进行以下步骤:(A)使叔丁醇与钠反应形成叔丁醇钠; (B)使叔丁醇钠与二氧化碳反应形成单叔丁基碳酸钠; 和(C)在叔胺如N,N,N',N'-四甲基乙二胺的存在下,使单叔丁基碳酸钠与芳族磺酰卤如对甲苯磺酰氯反应,而不分离中间体 每个反应阶段的中间。

    Process for producing chloroacetylaminothiazoleacetic acid derivatives
    7.
    发明公开
    Process for producing chloroacetylaminothiazoleacetic acid derivatives 失效
    Verfahren zur Herstellung vonChloroacetylaminothiazoleaceticsäureDerivate

    公开(公告)号:EP0859002A1

    公开(公告)日:1998-08-19

    申请号:EP98301090.1

    申请日:1998-02-13

    IPC分类号: C07D277/20 C07D277/44

    CPC分类号: C07D277/587

    摘要: The present invention relates to a simple process for producing 2-aminothiazoleacetic acid derivatives useful as intermediates for producing cephalosporin-type antibiotics. The process for producing chloroacetylaminothiazoleacetic acid derivatives represented by the following formula (II)
       wherein R1 is a protection group for the hydroxyl group,
    comprises reacting aminothiazoleacetic acid derivatives represented by the following formula (I)
       wherein R1 is a protection group for the hydroxyl group,
    with a chloroacetylating agent.

    摘要翻译: 本发明涉及可用作产生头孢菌素型抗生素的中间体的2-氨基噻唑乙酸衍生物的简单方法。 由下式(II)表示的氯代乙酰氨基噻唑乙酸衍生物的方法其中R1是羟基的保护基,包括使由下式(I)表示的氨基噻唑乙酸衍生物,其中R1是保护基 羟基的基团,与氯乙酰化剂。