Cyano-alicyclic esters in liquid crystal compositions

Details Cyano-alicyclic esters in liquid crystal compositions Cyano-alicyclic esters in liquid crystal compositions

1989-06-01

1992-09-15

Stoll, Robert L.

Compositions

Liquid crystal compositions

Containing nonsteryl liquid crystalline compound of...

25229967, 25229963, 558426, C09K 1930, C09K 1932, C07C25500

Patent

active

051475774

ABSTRACT:
Compounds suitable for use as constituents of ferroelectric smectic liquid crystal compositions, which are ester of formula (I), where R.sub.2 and R.sub.3 together represent the residue of an alicyclic hydrocarbon ring system where *C is an asymmetric carbon atom and X is a chain of up to three linked aromatic or alicyclic six-membered organic cyclic groups, laterally and/or terminally substituted. Preferred compounds have a formula (II), where R.sub.1 is alkyl or alkoxy, A, B, and D are phenyl, fluoro or chloro substituted phenyl or cyclohexyl, n is 0 or 1, Y is a bond or CH.sub.2 CH.sub.2 if n is 0, or a bond CH.sub.2 CH.sub.2 COO or COO if n is 1. Preferred groups C(CN)R.sub.2 R.sub.3 are formula (III) and (IV). ##STR1##

REFERENCES:
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patent: 4659499 (1998-04-01), Ferrato
patent: 4693841 (1987-09-01), Hittich et al.
patent: 4707295 (1987-11-01), Pohl et al.
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patent: 4784793 (1988-11-01), Coates et al.
patent: 4830470 (1989-05-01), Buchecker et al.
patent: 4886620 (1989-12-01), Hopf et al.
patent: 5002694 (1991-03-01), Wachtler et al.
CA 105:105909t, 18 Jan. 1986.

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