Preparation method of carfentrazone-ethyl
    78.
    发明授权
    Preparation method of carfentrazone-ethyl 有权
    氯氟酮的制备方法

    公开(公告)号:US08957220B2

    公开(公告)日:2015-02-17

    申请号:US14000170

    申请日:2012-01-12

    IPC分类号: C07D249/04 C07D249/12

    CPC分类号: C07D249/12

    摘要: A preparation method of carfentrazone-ethyl comprises steps of: reacting 1-(5-amino-4-chloro-2-fluorophenyl)-4-difluoromethyl-3-methyl-1H-1,2,4-triazol-5-one with acrylic acid through a diazo arylation reaction to give 2-chloro-3-{2-chloro-5-[4-(difluoromethyl)-4,5-dihydro-3-methyl-5-oxo-1H-1,2,3-triazol-1-yl]-4-fluorophenyl}propionic acid; and reacting the 2-chloro-3-{2-chloro-5-[4-(difluoromethyl)-4,5-dihydro-3-methyl-5-oxo-1H-1,2,3-triazol-1-yl]-4-fluorophenyl}propionic acid with ethanol through an esterification reaction in a presence of an acidic catalyst to give carfentrazone-ethyl.

    摘要翻译: 氟哌唑酮的制备方法包括以下步骤:使1-(5-氨基-4-氯-2-氟苯基)-4-二氟甲基-3-甲基-1H-1,2,4-三唑-5-酮与 通过重氮芳基化反应得到2-氯-3- {2-氯-5- [4-(二氟甲基)-4,5-二氢-3-甲基-5-氧代-1H-1,2,3 - 三唑-1-基] -4-氟苯基}丙酸; 并使2-氯-3- {2-氯-5- [4-(二氟甲基)-4,5-二氢-3-甲基-5-氧代-1H-1,2,3-三唑-1-基 ] -4-氟苯基}丙酸与乙醇通过酯化反应在酸性催化剂的存在下反应,得到氟酮唑酮。