.alpha.-hydroxyketone derivatives, liquid crystal compositions c

Details .alpha.-hydroxyketone derivatives, liquid crystal compositions c .alpha.-hydroxyketone derivatives, liquid crystal compositions c

1990-07-17

1992-11-17

Stoll, Robert L.

Compositions

Liquid crystal compositions

Containing nonsteryl liquid crystalline compound of...

25229963, 25229961, 25229966, 25229967, 25229965, 568305, 568306, 568307, 568308, 568335, 560 64, 560102, 546339, 546342, C09K 1906, C09K 1912, C07C20700, C07D21170

Patent

active

051641127

ABSTRACT:
.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.

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patent: 4973426 (1990-11-01), Ohno et al.
patent: 5049308 (1991-09-01), Mitsuhashi et al.

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