Production process and intermediate of tetrazole compound
    3.
    发明授权
    Production process and intermediate of tetrazole compound 失效
    四唑化合物的生产工艺和中间体

    公开(公告)号:US06191289B1

    公开(公告)日:2001-02-20

    申请号:US09176198

    申请日:1998-10-21

    IPC分类号: C07D25704

    摘要: There are disclosed an industrially favorable process for producing a tetrazole compound of general formula (1): characterized in that a nitrile of general formula (2): R1CN  (2) is reacted with hydrazine or a salt thereof in the presence of a catalyst, followed by reaction with a nitrous acid compound of general formula (3): ANO2  (3) or a nitrile of general formula (2) is reacted with hydrogen sulfide, followed by reaction with an alkyl halide of general formula (4): R4J  (4) with hydrazine or a salt thereof, and then with a nitrous acid compound of general formula (3); and an intermediate of general formula (5): R1C(═R5)R6  (5) which is useful for the production of the tetrazole compound (in which R1 to R6, A and J in the above formulas are as defined in the specification).

    摘要翻译: 公开了用于制备通式(1)的四唑化合物的工业上有利的方法:其特征在于通式(2)的腈与肼或其盐在催化剂存在下反应,然后与 将通式(3)的亚硝酸化合物或通式(2)的腈与硫化氢反应,然后与通式(4)的烷基卤反应:与肼或其盐反应,然后与 通式(3)的亚硝酸化合物; 和通式(5)的中间体:其可用于制备四唑化合物(其中上述式中的R 1至R 6,A和J如说明书中所定义)。

    Production process of 2-(tetrazol-5-yl)-4-oxo-4H-benzopyran
    5.
    发明授权
    Production process of 2-(tetrazol-5-yl)-4-oxo-4H-benzopyran 失效
    2-(四唑-5-基)-4-氧代-4H-苯并吡喃的制备方法

    公开(公告)号:US5597929A

    公开(公告)日:1997-01-28

    申请号:US601029

    申请日:1996-02-23

    IPC分类号: C07D405/04

    CPC分类号: C07D405/04

    摘要: There is disclosed a process for producing a 2-(tetrazol-5-yl)-4-oxo-4H-benzopyran of general formula (1): ##STR1## which comprises reacting a hydroxyacetophenone of general formula (2): ##STR2## with a tetrazole compound of general formula (3): ##STR3## in the presence of a base in a solvent composed mainly of at least one selected from hydrocarbons, halogenated hydrocarbons and alcohols, and then treating the reaction mixture under acidic conditions.

    摘要翻译: PCT No.PCT / JP95 / 01261 Sec。 371日期1996年2月23日 102(e)日期1996年2月23日PCT提交1995年6月23日PCT公布。 出版物WO96 / 日本1996年1月4日公开了一种制备通式(1)的2-(四唑-5-基)-4-氧代-4H-苯并吡喃的方法:其中包括使一般的羟基苯乙酮 式(2):式(3):(3)在碱存在下,在主要由至少一种选自烃,卤代烃和醇组成的溶剂中,然后在酸性条件下处理反应混合物 。