A process for the dehydrohalogenation of a (polyhaloalkyl)benzene containing a benzylic halogen such as 1, 3-dichloro- 5-(1,3,3,3-tetrachloro-I -methylpropyl)benzene by contacting the (polyhaloalkyl)benzene with a suitably active Lewis acid catalyst such as SbCl5 or TiCl4, neat or supported, under conditions sufficient to catalyze the dehydrohalogenation to form a (polyhaloalkenyl)benzene such as 3,5-dichloro-a-(2,2,2-trichloroethyl)styrene.
一种含有苄基卤素的(多卤代烷基)苯(如 1,3-二
氯-5-(1,3,3,3-四
氯-I-甲基丙基)苯)的脱氢卤化工艺,其方法是将(多卤代烷基)苯与适当活性的
路易斯酸催化剂(如 SbCl5 或 TiCl4)接触、在足以催化脱氢卤化反应生成(多卤代烷基)苯(如 3,5-二
氯-a-(2,2,2-三
氯乙基)
苯乙烯)的条件下。