Process for producing 2-vinylcyclododecanone
    6.
    发明授权
    Process for producing 2-vinylcyclododecanone 失效
    2-乙烯基环十二酮的制备方法

    公开(公告)号:US06548711B2

    公开(公告)日:2003-04-15

    申请号:US09876231

    申请日:2001-06-08

    IPC分类号: C07C49607

    CPC分类号: C07C45/67 C07C49/647

    摘要: A process for producing 2-vinylcyclododecanone, the process comprising isomerizing 2-ethylidenecyclododecanone represented by the following formula (1): wherein the wavy line signifies that the double bond is a Z-isomer, an E-isomer or a mixture of an E-isomer and a Z-isomer; in the presence of a catalyst and separating 2-vinylcyclododecanone represented by the following formula (2) from the reaction product by fractionation:

    摘要翻译: 一种生产2-乙烯基环十二酮的方法,该方法包括由下式(1)表示的2-亚乙基环十二烷异构化:其中波浪线表示双键是Z-异构体,E-异构体或E- 异构体和Z-异构体; 在催化剂的存在下,通过分馏从反应产物中分离出由下式(2)表示的2-乙烯基环十二烷:

    Antiferroelectric liquid crystal compound and antiferroelectric liquid
crystal composition containing the same
    8.
    发明授权
    Antiferroelectric liquid crystal compound and antiferroelectric liquid crystal composition containing the same 失效
    含有它的反铁电液晶化合物和反铁电液晶组合物

    公开(公告)号:US5667722A

    公开(公告)日:1997-09-16

    申请号:US653744

    申请日:1996-05-23

    摘要: An antiferroelectric liquid crystal compound represented by the following general formula (I): ##STR1## wherein R.sup.1 represents an alkyl group having 6 to 16 carbon atoms; R.sup.2 represents a straight chain alkyl group having 3 to 8 carbon atoms or a branched alkyl group having 4 to 10 carbon atoms; and * means an asymmetric carbon atom, and an antiferroelectric liquid crystal composition comprising at least one liquid crystal compound as defined above. The optically active compound of the present invention is highly miscible with a number of known antiferroelectric liquid crystal compounds and thus capable of providing liquid crystal materials having improved temperature properties. A liquid crystal composition containing the optically active compound of the present invention is applicable to electro-optical devices with the use of antiferroelectric liquid crystals.

    摘要翻译: 由以下通式(I)表示的反铁电液晶化合物:其中R 1表示碳原子数6〜16的烷基, R2表示碳原子数3〜8的直链烷基或碳原子数4〜10的支链烷基。 和*表示不对称碳原子,以及包含至少一种如上所定义的液晶化合物的反铁电液晶组合物。 本发明的光学活性化合物与多种已知的反铁电液晶化合物高度混溶,从而能够提供具有改善的温度特性的液晶材料。 含有本发明的光学活性化合物的液晶组合物可应用于使用反铁电液晶的电光装置。

    Liquid crystal compound and liquid crystal composition containing the
same
    10.
    发明授权
    Liquid crystal compound and liquid crystal composition containing the same 失效
    液晶化合物和含有它们的液晶组合物

    公开(公告)号:US5716542A

    公开(公告)日:1998-02-10

    申请号:US637284

    申请日:1996-04-24

    摘要: A liquid crystal compound represented by formula (I) and a liquid crystal composition containing the same. The compound exhibits an antiferroelectric liquid crystal phase and has good compatibility with known liquid crystal compounds. ##STR1## wherein R.sup.1 represents a straight-chain or branched alkyl, alkoxy, alkoxycarbonyl, alkanoyloxy or alkoxycarbonyloxy group having 4 to 16 carbon atoms; R.sup.2 represents a straight-chain alkyl group having 4 to 10 carbon atoms or a branched alkyl group containing 1 to 3 carbon atoms in its branch and 4 to 12 carbon atoms in total; X represents an oxygen or sulfur atom; rings A and B each represent an F-substituted or unsubstituted phenylene group, a cyclohexylene group or a divalent nitrogen-containing heterocyclic group, provided that either one of rings A and B is the nitrogen-containing heterocyclic group; ring C represents an F-substituted or unsubstituted phenylene group; and C* represents an asymmetric carbon atom.

    摘要翻译: 由式(I)表示的液晶化合物和含有该液晶化合物的液晶组合物。 该化合物表现出反铁电液晶相,与已知的液晶化合物具有良好的相容性。 (I)其中R1表示具有4至16个碳原子的直链或支链烷基,烷氧基,烷氧基羰基,烷酰氧基或烷氧基羰氧基; R2表示碳原子数为4〜10的直链烷基或碳原子数为1〜3的支链烷基,总共为4〜12个碳原子。 X表示氧或硫原子; 环A和B各自表示F取代或未取代的亚苯基,亚环己基或二价含氮杂环基,条件是环A和B中的任一个为含氮杂环基; 环C表示F取代或未取代的亚苯基; C *表示不对称碳原子。