| 摘要 |
NEW MATERIAL:A compound expressed by formula I (R<1> is R<2> or formula II or III; R<2> is 1-15C alkyl or alkoxyl; X is F, Cl, CN 1-15C alkyl or alkoxyl). EXAMPLE:beta-(4-Fluorophenyl)ethyl 4-(trans-4-propylcyclohexyl)benzoate. USE:A liquid crystal composition, having improved stability to moisture, heat, light, etc. and compatibility with another liquid crystal compound, e.g. ester based or Schieff based compound), and capable of giving liquid crystal compositions for various liquid crystal display elements. PREPARATION:A 4-substituted benzoyl chloride expressed by formula IV is reacted with beta-(4-substituted phenyl)ethyl alcohol expressed by formula V in the presence of pyridine to afford the aimed compound expressed by formula I.
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