Lactic acid derivatives having two asymmetric carbon atoms, liqu

Details Lactic acid derivatives having two asymmetric carbon atoms, liqu Lactic acid derivatives having two asymmetric carbon atoms, liqu

1991-11-08

1994-11-01

Wu, Shean

Compositions

Liquid crystal compositions

25229964, 25229965, 25229966, 25229967, 560 59, 560 64, 560 84, 560 87, 560180, 568583, 568659, 359 10, C09K 1952, C09K 1920, C07C 6976, G02F 113

Patent

active

053605756

ABSTRACT:
An optically active lactic acid derivative having the formula (1a): ##STR1## wherein A is O or S; B is --(CH.sub.2).sub.m -- or --(CH.sub.2).sub.n --O; R1 is an alkoxy group having 1-22 carbon atoms, a phenolate, a substituted phenolate, a hydroxy group, or a halogen atom; R2 is an alkyl group having 2-8 carbon atoms; m is 0, 1, 2, 3 or 4; n is 2, 3, 4 or 5; C* is an asymmetric carbon atom. Liquid crystal compositions and liquid crystal devices containing the above mentioned derivatives are also disclosed.

REFERENCES:
patent: 5080827 (1992-01-01), Miyazawa et al.
patent: 5185097 (1993-02-01), Toshida et al.
R. B. Meyer: Ferroelectric Liquid Crystals; 1975; pp. L-69 to L-71.
Noel A. Clark: Submicrosecond Bistable Electro-Optic Switching in Liquid Crystals; 1980; pp. 899 to 901.
W. Kuczynski: Ferroelectric Properties of Smectic Liquid Crystals with Induced Helical Structure; 1980; pp. 123-126.
Uni. of Pisa: The 14th International Liquid Crystal Conference; 1992; pp. 164, 165, 253, 304.
B. Otterhoom: Synthesis and Electro-Optical Properties of Some Rerroelectric Liquid Crystals Derived from Lactic Acid.
A. M. Lackner: Properties of New Ferroelectric Materials; 1989; 1259 to 1267.

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