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ANTIFERROELECTRIC LIQUID CRYSTAL COMPOUND EXCELLENT IN DEPENDENCE OF RESPONSE SPEED ON TEMPERATURE
ANTIFERROELECTRIC LIQUID CRYSTAL COMPOUND EXCELLENT IN DEPENDENCE OF RESPONSE SPEED ON TEMPERATURE
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机译：反铁液液晶化合物的优异性能取决于温度的响应速度
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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) pentyloxycarbonyl} phenyl-4'-decyl-3'-fluorobiphenyl-4-carboxylate. It has an index of temperature dependence of response time τ≤1.7. 1-Bromo-3-fluoro-4-iodobenzene as the starting compound is treated in two or more stages of reaction to produce a compound shown by formula II, which is chlorinated 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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