Ferroelectric liquid crystal compounds with cyclohexenyl cores a

Details Ferroelectric liquid crystal compounds with cyclohexenyl cores a Ferroelectric liquid crystal compounds with cyclohexenyl cores a

1992-08-07

1993-12-21

Stoll, Robert L.

Compositions

Liquid crystal compositions

Containing nonsteryl liquid crystalline compound of...

25229967, 544242, 544298, 544335, 548125, 548136, 560 59, 560102, 568630, C09K 1934, C07D23902, C07D28512, C07C 6976

Patent

active

052718646

ABSTRACT:
Ferroelectric liquid crystal compounds and compositions containing cyclohexenyl derivatives are provided. Specifically provided are compounds of formula: ##STR1## wherein R.sub.1 and R.sub.2 can be an alkyl, cycloalkyl, alkenyl, alkoxy, thioalkyl, alkylsilyl group having from one to about twenty carbon atoms. Y denotes --COO--, --OOC--, --CH.sub.2 O--, or --OCH.sub.2 --; and Ar.sub.1 and Ar.sub.2, independently of one another, can be selected from the group consisting of phenyl rings, halogenated phenyl rings and nitrogen-containing aromatic groups. In preferred embodiments the compounds of this invention contain at least one nitrogen-containing aromatic ring. Ar.sub.1 and Ar.sub.2 can be selected from 1,4-phenyl, mono- or dihalogenated 1,4-phenyl, 2,5-pyridinyl, 2,5-pyrimidyl, 2,5-pyrazinyl, 2,5-thiadiazole, 3,6-pyridazinyl and 1,4-cyclohexyl either or both be chiral racemic groups or chiral nonracemic groups.

REFERENCES:
patent: 4943384 (1990-07-01), Sucrow et al.
patent: 5180521 (1993-01-01), Eidenschink et al.
Li et al. (1991) Mol. Cryst. Liq. Cryst. 199:379-386.
Fung et al. (1989) Mol. Cryst. Liq. Cryst. Let. 6A(6):191-196.
Bezborodov et al. (1989) Liq. Cryst. 4(2):209-215.

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