Chiral compounds III
    7.
    发明授权
    Chiral compounds III 有权
    手性化合物

    公开(公告)号:US07041345B2

    公开(公告)日:2006-05-09

    申请号:US10332807

    申请日:2001-06-25

    摘要: The invention relates to chiral compounds of formula (I) wherein Y1, Y2, Y3, Y4, X1, X2, X3 and X4 have the meaning given in claim 1, to liquid crystalline mixtures comprising at least one chiral compound of formula (I), to chiral linear or crosslinked liquid crystalline polymers obtainable by polymerizing a polymerizable mixture comprising at least one chiral compound of formula (I), to the use of chiral compounds of formula (I) and mixtures and polymers obtained thereof in liquid crystal displays, active and passive optical elements, adhesives, synthetic resins with anisotropic mechanical properties, cosmetic and pharmaceutical compositions, diagnostics, liquid crystal pigments, for decorative and security applications, nonlinear optics, optical information storage or as chiral dopants, and to a liquid crystal display comprising a mixture comprising at least one chiral compound of formula (I)

    摘要翻译: 本发明涉及式(I)的手性化合物,其中Y 1,Y 2,Y 3,Y 4, >,X 1,X 2,X 3和X 4具有权利要求1中给出的含义,相对于 包含至少一种式(I)的手性化合物的液晶混合物,通过将包含至少一种式(I)的手性化合物的可聚合混合物聚合而获得的手性线性或交联的液晶聚合物与使用式(I)的手性化合物 I)及其在液晶显示器中获得的混合物和聚合物,主动和被动光学元件,粘合剂,具有各向异性机械性能的合成树脂,化妆品和药物组合物,诊断,液晶颜料,用于装饰和安全应用,非线性光学,光学信息 存储或作为手性掺杂剂,以及包含包含至少一种式(I)的手性化合物的混合物的液晶显示器,

    High purity alditol diacetals, free from organic solvent traces and
processes for preparing same
    9.
    发明授权
    High purity alditol diacetals, free from organic solvent traces and processes for preparing same 失效
    高纯度糖醇二缩醛,无有机溶剂痕迹及其制备方法

    公开(公告)号:US5023354A

    公开(公告)日:1991-06-11

    申请号:US549548

    申请日:1990-07-09

    CPC分类号: C07D493/04

    摘要: The invention is concerned with diacetals resulting of the dehyrocondensation of an alditol comprising 5 or 6 carbon atoms and a benzoic aldehyde such as in particular DBS, BEBS, BMBS or DBX, featuring a purity of at least 95% and being free of organic solvent traces, and a process for preparing the same in aqueous medium, in the presence of an acid catalyst, according to which acetalization is carried out by mixing the reactants under stirring, the reaction mixture is then neutralized by a base, then the solid phase is separated from the liquid phase and washed with warm water, wherein: the initial molar ratio of the benzoic aldehyde to the alditol is lower than 2/1, the acid catalyst is an arylsulfonic acid, the initial molar ratio of the arylsulfonic acid to the benzoic aldehyde is higher than 0.6, and the reaction temperature is lower than about 45.degree. C.Application specially to the clarification and stabilization of polyolefins.

    摘要翻译: 本发明涉及由5或6个碳原子的糖醇和苯甲醛如特别是DBS,BEBS,BMBS或DBX进行脱水缩合得到的二缩醛,其特征在于至少95%的纯度,并且不含有机溶剂痕迹 ,以及在酸性催化剂存在下,在水性介质中制备该方法的方法,根据该方法,通过在搅拌下混合反应物进行缩醛化,然后将反应混合物用碱中和,然后分离固相 从液相中用温水洗涤,其中:苯甲醛与醛醇的初始摩尔比低于2/1,酸催化剂为芳基磺酸,芳基磺酸与苯甲醛的初始摩尔比 高于0.6,反应温度低于约45℃。特别适用于聚烯烃的澄清和稳定化。

    Internal hydroformylation of acrolein acetals
    10.
    发明授权
    Internal hydroformylation of acrolein acetals 失效
    丙烯醛缩醛的内部加氢甲酰化

    公开(公告)号:US4374999A

    公开(公告)日:1983-02-22

    申请号:US222184

    申请日:1981-01-02

    申请人: Philip E. Garrou

    发明人: Philip E. Garrou

    摘要: Acrolein acetals are selectively hydroformylated on the unsaturated carbon atom adjacent to the carbon bearing two ether groups in the presence of a supported rhodium-cobalt bimetallic cluster. The resulting internally hydroformylated product is useful as a precursor of methacrylic acid.

    摘要翻译: 在负载的铑 - 钴双金属簇的存在下,丙烯醛缩醛在与具有两个醚基团的碳相邻的不饱和碳原子上选择性加氢甲酰化。 所得的内加氢甲酰化产物可用作甲基丙烯酸的前体。