申请人:Chisso Corporation
公开号:US05164112A1
公开(公告)日:1992-11-17
.alpha.-hydroxyketone derivatives represented by the general formula (I) which are novel optically active compounds; liquid crystal compositions, such as chiral smectic or chiral nematic compositions, containing the derivatives; and liquid crystal devices using the compositions. ##STR1## wherein A and B are independently a radical represented by the general formula (II): ##STR2## wherein R.sup.2 is an aliphatic hydrocarbon having 1 to 16 carbon atoms, which may contain --O-- and may be substituted by a cyano group and/or a halogen atom, ##STR3## are independently a single bond, ##STR4## etc., X and Y are independently a single bond, or --CH.sub.2 CH.sub.2 --, etc., or an aliphatic hydrocarbon having 1 to 16 carbon atoms; R.sup.1 is an alkyl group, a phenyl group, or a cyclohexyl group; n is 0 or 1; and the asterisk (*) indicates an asymmetric carbon atom.
本发明涉及一种新的光学活性化合物,即由一般式(I)表示的.alpha.-羟基酮衍生物;包含该衍生物的手性液晶组合物,例如手性列型或手性向列型组合物;以及使用该组合物的液晶装置。其中,A和B分别是由一般式(II)表示的基团:其中,R.sup.2是具有1至16个碳原子的脂肪烃,可以含有--O--并且可以被氰基和/或卤素原子取代,R.sup.3和R.sup.4分别是单键,等等,X和Y分别是单键,或--CH.sub.2 CH.sub.2 --等的脂肪烃,具有1至16个碳原子;R.sup.1是烷基,苯基或环己基;n为0或1;星号(*)表示不对称碳原子。