Optically active compound, process for producing same and liquid crystal
composition containing same
    45.
    发明授权
    Optically active compound, process for producing same and liquid crystal composition containing same 失效
    光学活性化合物,其制备方法和含有该组合物的液晶组合物

    公开(公告)号:US4873018A

    公开(公告)日:1989-10-10

    申请号:US112936

    申请日:1987-10-27

    IPC分类号: C09K19/06

    CPC分类号: C09K19/06

    摘要: An optically active 2-fluoro-1-alkanol compound represented by the formula (Ia): ##STR1## wherein R is an alkyl group having 1-16 carbon atoms, and C* is an asymmetric carbon atom; and an optically active compound derived from the fluoroalkanol and represented by the formula (Ib): ##STR2## wherein R and C* are the same as above, m is 1 or 2, n is 0 or 1, and A is a releasable substitutent. Because of the fluorine atom directly attached to an asymmetric carbon atom, these compounds are particularly effective in increasing a spontaneous polarization, improving a electric field responsive characteristic of a liquid crystal composition, and controlling the liquid crystal state.

    摘要翻译: 由式(Ia)表示的光学活性2-氟-1-链烷醇化合物:其中R是具有1-16个碳原子的烷基,C *是不对称碳原子; 和由式(Ib)表示的光学活性化合物:其中R和C *与上述相同,m为1或2,n为0或1,A为 可释放的替代品。 由于氟原子直接连接到不对称碳原子上,这些化合物在增加自发极化,改善液晶组合物的电场响应特性和控制液晶状态方面特别有效。

    Method for optical resolution of 2-(4-chlorophenyl)-3-methylbutanoic acid
    47.
    发明授权
    Method for optical resolution of 2-(4-chlorophenyl)-3-methylbutanoic acid 失效
    2-(4-氯苯基)-3-甲基丁酸的光学拆分方法

    公开(公告)号:US4376213A

    公开(公告)日:1983-03-08

    申请号:US344523

    申请日:1982-02-01

    CPC分类号: C07C51/487

    摘要: A method for optical resolution of 2-(4-chlorophenyl)-3-methylbutanoic acid, which comprises crystallizing out the salt between (+) or (-)-2-(4-chlorophenyl)-3-methylbutanoic acid and diethylamine in a molar proportion of 2:1 predominantly from a super-saturated solution of the salt of 2-(4-chlorophenyl)-3-methylbutanoic acid with diethylamine, collecting the crystallized salt and decomposing the collected salt under acidic conditions to obtain the corresponding optically active acid.

    摘要翻译: 一种2-(4-氯苯基)-3-甲基丁酸的光学拆分方法,其包括在(+)或( - ) - 2-(4-氯苯基)-3-甲基丁酸和二乙胺中的盐 摩尔比例2:1主要来自2-(4-氯苯基)-3-甲基丁酸的盐与二乙胺的过饱和溶液,收集结晶盐并在酸性条件下分解收集的盐,得到相应的光学活性 酸。