| 摘要 |
A process for preparing an .alpha.-substituted styrene, such as 2-(3,5-dichlorophenyl)-4,4,4-trichloro-1-butene, comprising reacting, in the absence of an added Lewis acid, an .alpha.-haloalkylbenzene, such as 3-(3,5-dichlorophenyl)-1,1,1,3-tetrachlorobutane, with .gamma.alumina dried to a moisture content between zero to 12 percent by weight is described herein. The .gamma.-alumina serves to catalyze the dehydro-halogenation of the .alpha.haloalkylbenzene to produce the .alpha.-substituted styrene. 32,980
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