PROCESSES FOR PRODUCING p-SUBSTITUTED PHENOLS
    6.
    发明公开
    PROCESSES FOR PRODUCING p-SUBSTITUTED PHENOLS 失效
    VERFAHREN ZUR HERSTELLUNG VON p-SUBSTITUIERTEN PHENOLEN

    公开(公告)号:EP0990633A4

    公开(公告)日:2000-06-14

    申请号:EP98911225

    申请日:1998-04-07

    申请人: CHISSO CORP

    IPC分类号: C07C37/20 C07C39/17

    摘要: A process for highly selectively producing high yields of p-substituted phenols without forming a large amount of a metal-containing waste water, and another process for highly selectively producing a p-substituted cyclohexylphenol having a trans-1,4-disubstituted cyclohexane moiety from a 4-substituted cyclohexanone. The p-substituted phenols are produced by reacting a phenol with a carbonyl compound in the presence of a clayey mineral as the catalyst.

    摘要翻译: 高选择性地高选择性地制造高收率的对位取代苯酚而不形成大量含金属废水的方法,以及另一种高选择性地制备具有反式-1,4-二取代环己烷部分的对位取代环己基苯酚的方法 4-取代的环己酮。 对位取代苯酚是在粘土矿物作为催化剂存在下,通过酚与羰基化合物反应制得的。

    SUBSTITUTED BENZENE DERIVATIVE, LIQUID-CRYSTAL COMPOSITION, AND LIQUID-CRYSTAL DISPLAY ELEMENT
    9.
    发明公开
    SUBSTITUTED BENZENE DERIVATIVE, LIQUID-CRYSTAL COMPOSITION, AND LIQUID-CRYSTAL DISPLAY ELEMENT 失效
    SUBSTITUIERTE BENZOLDERIVATE,FLUESSIGKRISTALLINE ZUSAMMENSETZUNGEN和FLUESSIGKRISTALLINES ANZEELEEMEMENT

    公开(公告)号:EP0934919A4

    公开(公告)日:2001-09-26

    申请号:EP97941230

    申请日:1997-09-25

    申请人: CHISSO CORP

    摘要: A liquid-crystal compound which exhibits high voltage retention and low threshold voltage, has very small dependency upon the temperature, has a large Δn value, and has excellent compatibility with other liquid-crystal materials at low temperatures; a liquid-crystal composition comprising the same; and a liquid-crystal display element made by using the same. The liquid-crystal compound is a substituted benzene derivative represented by general formula (1), wherein R represents a straight-chain or branched alkyl group having 1 to 20 carbon atoms and the methylene groups (-CH2-) not adjacent to each other in the alkyl group may be substituted by an oxygen atom; X represents a halogen atom, -CF3, -CF2H, -CFH2, -OCF3, or -OCF2H; Z1 and Z2 each independently represents -(CH2)2-, -(CH2)4-, -CH2O-, -OCH2-, or a covalent bond, provided that Z1 and Z2 are not simultaneously a covalent bond; and Y1, Y2, Y3, Y4, Y5 and Y6 each independently represents H or F, provided that at least one of Y1, Y2, Y3 and Y4 represents fluorine and each atom constituting this compound may be substituted by an isotopic atom.

    摘要翻译: 具有高电压保持率和低阈值电压的液晶化合物对温度的依赖性非常小,具有大的Δn值,并且在低温下与其他液晶材料具有优异的相容性; 包含其的液晶组合物; 以及使用其制成的液晶显示元件。 该液晶化合物是通式(1)表示的取代苯衍生物,其中R代表具有1-20个碳原子的直链或支链烷基和不相邻的亚甲基(-CH2-) 该烷基可以被氧原子取代; X表示卤原子,-CF 3,-CF 2 H,-CFH 2,-OCF 3或-OCF 2 H; Z1和Z2各自独立地表示 - (CH2)2 - , - (CH2)4-,-CH2O-,-OCH2-或共价键,条件是Z1和Z2不同时为共价键; Y 1,Y 2,Y 3,Y 4,Y 5和Y 6各自独立地表示H或F,条件是Y 1,Y 2,Y 3和Y 4中的至少一个表示氟并且构成该化合物的每个原子可以被同位素原子取代。