The present invention relates to a liquid crystal compound for liquid crystal display. More particularly, the present invention provides a vinylcyclohexylbenzene, its derivatives and the preparation method thereof where the present invention produces only trans-isomer by using Heck coupling reaction instead of Wittig reaction in the introduction to ethenyl group in the central backbone in the preparation process of intermediate. The liquid crystal compound can make the liquid crystal composition have a wide mesophase range and low viscosity.
本发明涉及一种用于液晶显示的液晶化合物。更具体地说,本发明提供了一种
乙烯环己基苯乙烯及其衍
生物以及其制备方法,其中本发明在中间体的制备过程中使用 Heck 偶联反应而不是 Wittig 反应来引入中央骨架中的
乙烯基,从而仅产生反式异构体。该液晶化合物可以使液晶组合物具有宽的介晶相范围和低粘度。