Preparation of 5-amino-1,2,4-triazole-3-sulfonamides and intermediates
    1.
    发明公开
    Preparation of 5-amino-1,2,4-triazole-3-sulfonamides and intermediates 失效
    Herstellung von 5-氨基-1,2,4-三唑-3-磺酰胺和Zwischenverbindungen。

    公开(公告)号:EP0375061A1

    公开(公告)日:1990-06-27

    申请号:EP89203237.6

    申请日:1989-12-18

    申请人: DowElanco

    IPC分类号: C07D249/14

    CPC分类号: C07D249/14 Y02P20/582

    摘要: A process for preparing 5-amino-1,2,4-triazole-­3-sulfonamides, which are intermediates for substituted 1,2,4-triazolo[1,5-a]-pyrimidine-2-sulfonamide herbicides, in two steps from 5-amino-3-mercapto-1,2,4-­triazole by chlorination in a medium containing an aqueous acid to obtain 5-amino-3-chlorosulfonyl-1,2,4-­triazole and subsequent condensation of this intermediate with substituted anilines is disclosed. The condensation reaction takes place either in the presence or absence of an acid scavenging base. Novel intermediates are also provided.

    摘要翻译: 制备5-氨基-1,2,4-三唑-3-磺酰胺的方法,其为取代的1,2,4-三唑并[1,5-a] - 嘧啶-2-磺酰胺除草剂的中间体,分两步 由5-氨基-3-巯基-1,2,4-三唑通过在含有酸的水溶液中氯化得到5-氨基-3-氯磺酰基-1,2,4-三唑,随后将该中间体与取代的 披露了苯胺。 缩合反应在存在或不存在酸清除碱的情况下进行。 还提供了新的中间体。