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.
本发明涉及用于液晶显示器的液晶化合物。更具体地说,本发明提供了一种
乙烯基环己基苯,其衍
生物及其制备方法,其中本发明在中间体制备过程中,在引入中央骨架中的
乙烯基团时,使用Heck偶联反应而不是Wittig反应,仅产生顺式异构体。此液晶化合物可使液晶组成物具有广泛的介相范围和低粘度。