The counter it is strong dielectric liquid crystal chemical compound null which is superior in the temperature dependence of

摘要

PROBLEM TO BE SOLVED: To obtain a new compound, capable of manifesting stable antiferroelectricity at about ambient temperature and excellent in temperature dependence of response speed sufficiently usable for displays. ;SOLUTION: This compound is represented by formula I (R¹ is a 4-12C alkyl; R² is a 4C, a 6C, an 8C or a 10C alkyl; * indicates optically active carbon) and, e.g. 4-(2-octyloxycarbonyl)phenyl 4'-n-nonyloxy-2-fluorobiphenyl-4-carboxylate is cited. The compound represented by formula I is obtained by reacting a 4'-alkyloxy-3-fluoro-4-biphenylcarboxylic acid with a chlorinating agent and then reacting the resultant compound with a 2-alkyl 4-hydroxybenzoate represented by formula III in a solvent (e.g. methylene chloride) in the presence of triethylamine or dimethylaminopyridine as a catalyst at ambient temperature in a nitrogen atmosphere.;COPYRIGHT: (C)1997,JPO