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LIQUID CRYSTAL COMPOUND EXCELLENT IN DEPENDENCE OF RESPONSE SPEED ON TEMPERATURE AND HAVING STABLE ANTIFERROELECTRIC PHASE
LIQUID CRYSTAL COMPOUND EXCELLENT IN DEPENDENCE OF RESPONSE SPEED ON TEMPERATURE AND HAVING STABLE ANTIFERROELECTRIC PHASE
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机译：液体晶体化合物的优异性能取决于温度和具有稳定的反铁电相的反应速度
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摘要
PROBLEM TO BE SOLVED: To obtain a new antiferroelectric liquid crystal compound free of possibility of showing defects, such as uneven display or the like, when working as a display and excellent in dependence of response speed on temperature by adequately positioning the fluorine-modified site in the main skeleton in the antiferroelectric liquid crystal compound. ;SOLUTION: This antiferroelectric liquid crystal compound is shown by formula I (R1 is a 6-16C alkyl; R2 is a 2-10C alkyl; Cf is CH3 or CF3; and *is optically active carbon), e.g. 4-{1-(trifluoromethyl) benzyloxycarbonyl} phenyl-4'-decyl-3-fluorobiphenyl-4-carboxylate. It has an index of temperature dependence of response time τ1≤1.7. A Grignard reaction liquor composed of 1-bromo-4-decylbenzene, Mg and tetrahydrofuran as the starting material is treated in two or more stages of reaction to produce a compound shown by formula II, which is converted into the corresponding chloride with a chlorinating agent and then reacted with 1-(trifluoromethyl) pentyl-4-hydroxybenzoate in a nitrogen atmosphere, to produce the objective compound after it is separated and purified.;COPYRIGHT: (C)1998,JPO
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