Process for the preparation of 3-mercapto-5-amino-(1H)-1,2,4-triazole
    4.
    发明公开
    Process for the preparation of 3-mercapto-5-amino-(1H)-1,2,4-triazole 失效
    Verfahren zur Herstellung von 3-巯基-5-氨基 - (1H)-1,2,4-三唑。

    公开(公告)号:EP0318096A1

    公开(公告)日:1989-05-31

    申请号:EP88202619.8

    申请日:1988-11-22

    申请人: DowElanco

    IPC分类号: C07D249/14

    CPC分类号: C07D249/14

    摘要: 3-Mercapto-5-amino-(1H)-1,2,4-triazole is prepared by the rearrangement of 2,5-diamino-1,3,4-­thiadiazole. The rearrangement proceeds in high yields under aqueous alkaline conditions.

    摘要翻译: 3-巯基-5-氨基 - (1H)-1,2,4-三唑通过2,5-二氨基-1,3,4-噻二唑的重排制备。 在水性碱性条件下,重排以高产率进行。

    Preparation of N-(3-(((aryl)amino)sulfonyl)-1H-1,2,4-triazol-5-yl)amines
    6.
    发明公开
    Preparation of N-(3-(((aryl)amino)sulfonyl)-1H-1,2,4-triazol-5-yl)amines 失效
    Herstellung von N-(3 - (((芳基)氨基)磺酰基)-1H-1,2,4-三唑-5-基)氨基。

    公开(公告)号:EP0401907A1

    公开(公告)日:1990-12-12

    申请号:EP90201392.9

    申请日:1990-06-01

    申请人: DOWELANCO

    IPC分类号: C07D249/14

    CPC分类号: C07D249/14

    摘要: N-(3-(((2,6-Dihalophenyl)amino)sulfonyl)-1H­-1,2,4-triazol-5-yl)amines, intermediates for the preparation of herbicidal substituted 1,2,4-triazolo­(1,5-a)pyrimidine-2-sulfonanilides, are directly prepared from an appropriately substituted 4-bromo­aniline and a protected 5-amino-1,2,4-triazole-3­-sulfonyl chloride. The improved reaction scheme involves the individual reaction steps of (a) coupling, (b) halogenation and (c) reduction.

    摘要翻译: N-(3 - (((2,6-二卤代苯基)氨基)磺酰基)-1H-1,2,4-三唑-5-基)胺,用于制备除草取代的1,2,4-三唑并 1,5-a)嘧啶-2-磺酰苯胺由适当取代的4-溴苯胺和受保护的5-氨基-1,2,4-三唑-3-磺酰氯直接制备。 改进的反应方案包括(a)偶联,(b)卤化和(c)还原的各个反应步骤。

    A process for the preparation of 2,6-difluoroaniline from 1,2,3-trichlorobenzene
    7.
    发明公开
    A process for the preparation of 2,6-difluoroaniline from 1,2,3-trichlorobenzene 失效
    Verfahren zur Herstellung von 2,6-Difluoroanilin aus 1,2,3-三氯苯。

    公开(公告)号:EP0506199A2

    公开(公告)日:1992-09-30

    申请号:EP92200865.1

    申请日:1992-03-26

    申请人: DOWELANCO

    IPC分类号: C07C209/10 C07C211/52

    摘要: 2,6-Difluoroaniline is prepared from 1,2,3-trichlorobenzene by partial fluorine exchange to a mixture of 2,6-difluorochlorobenzene and 2,3-difluorochlorobenzene, selective reduction to a mixture of 2,6-difluorochlorobenzene and ortho -difluorobenzene, and amination to 2,6-difluoroaniline. The undesirable 2,3-difluorochlorobenzene is converted into valuable ortho -difluorobenzene and the 2,3-difluoroaniline isomer is avoided.

    摘要翻译: 2,6-二氟苯胺由1,2,3-三氯苯通过部分氟交换制备成2,6-二氟氯苯和2,3-二氟氯苯的混合物,选择性还原为2,6-二氟氯苯和邻二氟苯的混合物 并胺化成2,6-二氟苯胺。 将不希望的2,3-二氟氯苯转化为有价值的邻二氟苯,避免了2,3-二氟苯胺异构体。

    Preparation of difluorobenzenes containing electron withdrawing substituents
    10.
    发明公开
    Preparation of difluorobenzenes containing electron withdrawing substituents 失效
    维生素Zur Herstellung von Difluorobenzolen mit elektronenabziehenden Substituenten。

    公开(公告)号:EP0372621A1

    公开(公告)日:1990-06-13

    申请号:EP89203010.7

    申请日:1989-11-27

    申请人: DowElanco

    IPC分类号: C07C25/13 C07C255/50

    摘要: 3,4-Difluoro substituted benzenes are prepared by reacting 3,4-dihalo substituted benzenes with an effective amount of KF or CsF, in a polar aprotic solvent, at an elevated temperature, under substantially anhydrous conditions. The product can be removed as it is formed or the reaction may be run at the autogenous pressures generated by the reaction mixture in a sealed reactor.

    摘要翻译: 3,4-二氟取代的苯通过使3,4-二卤代取代的苯与有效量的KF或CsF在极性非质子溶剂中,在升高的温度下,在基本上无水的条件下反应制备。 产物可以在其形成时被除去,或者反应可以在密封反应器中由反应混合物产生的自生压力下进行。