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    METHOD FOR PRODUCING CARBOXYLIC ANHYDRIDE
    3.
    发明申请
    METHOD FOR PRODUCING CARBOXYLIC ANHYDRIDE 审中-公开

    公开(公告)号：US20170197948A1

    公开(公告)日：2017-07-13

    申请号：US15312809

    申请日：2015-05-13

    申请人： JX NIPPON OIL & ENERGY CORPORATION

    发明人： Rieko FUJISHIRO ,  Ayumu KOMATA ,  Takeshi KOIKE ,  Shinichi KOMATSU

    IPC分类号： C07D407/08

    CPC分类号： C07D407/08 ,  C07D493/10

    摘要： Method for producing carboxylic anhydride, the method includes heating raw material compound represented by the following general formula (1): [in the formula (1), R1 is tetravalent organic group having at least two carbon atoms adjacent to each other, and groups represented by the formulae: —COOR2 and —COOR3 are bonded to one and the other of the two adjacent carbon atoms, respectively, R2 and R3 each represent hydrogen atom or the like, X represents hydrogen atom or the like, and Y represents hydrogen atom or the like] in carboxylic acid having 1 to 5 carbon atoms with catalyst being used, to thereby obtain the carboxylic anhydride, wherein the catalyst is homogeneous acid catalyst having acid dissociation constant (pKa) of −6.5 or lower and boiling point of 100° C. or higher, the acid dissociation constant (pKa) being determined by quantum chemistry calculation based on density functional method.

    DIHYDROPYRAN COMPOUND, LIQUID CRYSTAL COMPOSITION AND LIQUID CRYSTAL DISPLAY DEVICE
    4.
    发明申请
    DIHYDROPYRAN COMPOUND, LIQUID CRYSTAL COMPOSITION AND LIQUID CRYSTAL DISPLAY DEVICE 有权
    二氢化合物，液晶组合物和液晶显示装置

    公开(公告)号：US20150252264A1

    公开(公告)日：2015-09-10

    申请号：US14638983

    申请日：2015-03-04

    申请人： JNC CORPORATION ,  JNC PETROCHEMICAL CORPORATION

    发明人： Mayumi GOTO ,  Kenji HIRATA ,  Yasuyuki SASADA

    IPC分类号： C09K19/34 ,  C07D309/22 ,  C07D407/08 ,  C07F7/08 ,  C07D493/08 ,  C07D407/04 ,  C07D309/20 ,  C07D309/28

    CPC分类号： C09K19/3402 ,  C07D309/20 ,  C07D309/22 ,  C07D309/28 ,  C07D407/04 ,  C07D407/08 ,  C07D493/08 ,  C07F7/0896 ,  C09K2019/3422

    摘要： To provide a liquid crystal compound satisfying at least one of physical properties such as high stability to ultraviolet light and heat, a high clearing point, low minimum temperature of a liquid crystal phase, small viscosity, suitable optical anisotropy, large dielectric anisotropy and excellent compatibility with other liquid crystal compounds, and a liquid crystal composition containing the compound, and a liquid crystal display device including the composition.The compound includes a compound represented by formula (1): wherein, Ra and Rb are alkyl or the like; A1, A2 and A3 are 1,4-cyclohexylene, 1,4-phenylene or the like; G is a divalent group represented by formula (pr-1) or (pr-2); wherein, Z1, Z2 and Z3 are a single bond, alkylene or the like; and a and b are 0, 1, 2 or 3, and a sum of a and b is 4 or less.

    摘要翻译： 为了提供满足紫外光和热的高稳定性，高透明点，液晶相的最低最低温度，低粘度，适当的光学各向异性，大的介电各向异性和优异的相容性的物理性能中的至少一种的液晶化合物 和其它液晶化合物，以及含有该化合物的液晶组合物和包含该组合物的液晶显示装置。 该化合物包括由式（1）表示的化合物：其中，Ra和Rb是烷基等; A1，A2和A3是1,4-亚环己基，1,4-亚苯基等; G是由式（pr-1）或（pr-2）表示的二价基团。 其中，Z 1，Z 2和Z 3为单键，亚烷基等; a和b分别为0,1,2或3，a和b之和为4以下。