Alpha-hydroxyketone derivatives, liquid crystal compositions containing said derivatives, and liquid crystal devices using said compositions
申请人:Chisso Corporation
公开号:EP0409234A2
公开(公告)日:1991-01-23
α-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. General Formula (I)
wherein A and B are independently a radical represented by the general formula (II):
wherein R2 is an aliphatic hydrocarbon having 1 to 16 carbon atoms, which may contain -0- and may be substituted by a cyano group and/or a halogen atom,
are independently a single bond,
etc., X and Y are independently a single bond, or -CH2CH2-, etc., or an aliphatic hydrocarbon having 1 to 16 carbon atoms; R1 is an alkyl group, a phenyl group, or a cyclohexyl group; n is 0 or 1; and the asterisk (*) indicates an asymmetric carbon atom.
由通式(I)代表的α-羟基酮衍生物,是新型光学活性化合物;含有该衍生物的液晶组合物,如手性硅胶组合物或手性向列型组合物;以及使用该组合物的液晶器件。通式 (I)
其中 A 和 B 独立地为通式 (II) 所代表的基团:
其中 R2 是具有 1 至 16 个碳原子的脂肪族烃,可含有 -0- 并可被氰基和/或卤素原子取代、
独立地为单键、
等,X 和 Y 独立地为单键或-CH2CH2-等,或为具有 1 至 16 个碳原子的脂肪烃;R1 为烷基、苯基或环己基;n 为 0 或 1;星号(*)表示不对称碳原子。