A novel 3-substituted α,β-dibromoethylbenzene of formula (I):
wherein X represents a halogen atom or a trihalomethyl group, which is a useful intermediate for pharmaceuticals or agricultural chemicals, is prepared by a simple and high yield process which comprises reacting a 3-substituted α-bromoethylbenzene represented by formula (II):
wherein X is as defined above,
or a 3-substituted ethylbenzene represented by formula (III):
wherein X is as defined above, with bromine in the presence of a quaternary ammonium salt.
一种新型 3-取代α,β-二
溴乙基苯,其式为(I):
其中 X 代表卤素原子或三卤甲基,是一种有用的医药或农药中间体,其制备方法简单且收率高,包括将式(II)代表的 3-取代α-
溴乙苯与式(I)代表的 3-取代α,β-二
溴乙苯反应:
其中 X 如上定义、
或式 (III) 所代表的 3-取代
乙基苯:
其中 X 如上定义,在季
铵盐存在下与
溴反应。