Method for producing 4-amino-5-chloro-1-phenyl pyridazinone-(6)
    1.
    发明授权
    Method for producing 4-amino-5-chloro-1-phenyl pyridazinone-(6) 失效
    4-氨基-5-氯-1-苯基哒嗪酮的制备方法(6)

    公开(公告)号:US06538135B1

    公开(公告)日:2003-03-25

    申请号:US09937812

    申请日:2001-09-28

    IPC分类号: C07D23714

    CPC分类号: C07D237/22

    摘要: In a process for preparing 4-amino-5-chloro-1-phenylpyridazin-6-one by reacting 4,5-dichloro-1-phenylpyridazin-6-one with aqueous ammonia in the presence of a catalyst, the catalyst used is soluble in the aqueous alkaline reaction medium but is essentially insoluble in the reaction medium which has been acidified after removal of the 4-amino-5-chloro-1-phenylpyridazin-6-one. The process of the present invention makes it possible for the catalyst to be recovered and reused in a simple manner.

    摘要翻译: 在催化剂存在下,通过使4,5-二氯-1-苯基哒嗪-6-酮与氨水反应制备4-氨基-5-氯-1-苯基哒嗪-6-酮的方法,所用的催化剂是可溶的 在碱性水溶液中,但基本上不溶于除去4-氨基-5-氯-1-苯基哒嗪-6-酮后酸化的反应介质。本发明方法使催化剂 以简单的方式恢复和重复使用。