Process for producing brominated trifluoromethylbenzenes
    1.
    发明授权
    Process for producing brominated trifluoromethylbenzenes 失效
    溴化三氟甲基苯的制备方法

    公开(公告)号:US06506951B1

    公开(公告)日:2003-01-14

    申请号:US09551912

    申请日:2000-04-19

    IPC分类号: C07C2200

    摘要: The invention relates to a process for producing a brominated trifluoromethylbenzene represented by the general formula (1). This process includes brominating in a liquid or gas phase a trifluoromethylbenzene, represented by the general formula (2), by bromine in the presence of a catalyst under a condition that the bromine is coexistent with chlorine, where n is an integer of 1-2, and m is an integer of 1-3 where n is an integer of 1-2. The catalyst is preferably iron chloride in the case of the bromination in a liquid phase. It is preferably activated carbon carrying thereon iron chloride in the case of the bromination in a gas phase. The trifluoromethylbenzene is turned to the brominated trifluoromethylbenzene with high reactivity and high yield.

    摘要翻译: 本发明涉及由通式(1)表示的溴代三氟甲基苯的制备方法。 该方法包括在液相或气相中溴在溴中与氯共存的条件下,在溴存在下,用溴在通式(2)表示的三氟甲基苯中溴化,其中n为1-2的整数 ,m为1-3的整数,其中n为1-2的整数。 在液相中溴化的情况下,催化剂优选为氯化铁。 在气相溴化的情况下,优选载有氯化铁的活性炭。 三氟甲基苯转化为溴化三氟甲基苯,反应性高,产率高。