PROCESS FOR PREPARING 3-AMINO-1,2,4-BENZOTRIAZINE DIOXIDE
    4.
    发明公开
    PROCESS FOR PREPARING 3-AMINO-1,2,4-BENZOTRIAZINE DIOXIDE 失效
    VERFAHREN ZUR HERSTELLUNG VON 3-AMINO-1,2,4--BENZOTRIAZINDIOXIDE

    公开(公告)号:EP0865435A4

    公开(公告)日:1998-12-23

    申请号:EP96941445

    申请日:1996-11-21

    申请人: SANOFI SA

    发明人: PHILION RICHARD E

    CPC分类号: C07D253/10

    摘要: Process of producing 3-amino-1,2,4-benzotriazine 1,4-dioxide by reacting benzofurazan-1 oxide with disodiumcyanamide under homogeneous conditions followed by allowing crystallization to occur in a buffered solution. In a preferred embodiment, the process comprises reacting benzofurazan-1 oxide with cyanamide and sodium hydroxide under homogeneous conditions followed by purification in a mixture of acetone and acetic acid.

    摘要翻译: 通过在均相条件下使苯并呋咱-1氧化物与二氰基氰胺反应制备3-氨基-1,2,4-苯并三嗪1,4-二氧化物的方法,随后在缓冲溶液中进行结晶。 在一个优选的实施方案中,该方法包括在均相条件下使苯并呋咱-1氧化物与氰胺和氢氧化钠反应,然后在丙酮和乙酸的混合物中纯化。