Li Rui-jun
2000
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Journal
Chinese Journal of Liquid Crystals and Displays
Abstract
The liquid crystal compounds of 4-(4-trans-4-n -alkylcyclohexanemethoxy )-4'-cyanobiphenyls has been synthesized from trans-4- n -alkylcyclohexanemethol and 4-bro-mo-4'-hydroxybiphenyls. The reaction conditions has been studied and the study showed that: cupric ion has the catalysis to the reaction of trans-4- n -alkylcyclohexanemethol and bromine hydride,etherifying reaction gets higher yield under the effect of phase transfer catalysis, N-methyl-2-pyrrolidone is the better solvent for cyanating reaction. All produc-tions were identified by IR, MS and element analyses, and the measurement of DSC showed that these compounds have higher clear point.