Optically active compound, liquid crystal composition containing

Details Optically active compound, liquid crystal composition containing Optically active compound, liquid crystal composition containing

1996-11-13

1998-12-15

Wu, Shean C.

Compositions

Liquid crystal compositions

Containing nonsteryl liquid crystalline compound of...

25229962, 25229963, 319182, 549295, 549313, 549318, 549320, 549322, 549323, 549324, C09K 1934, G02F 1133, C07D30702, C07D30512

Patent

active

058492178

ABSTRACT:
An optically active compound represented by the formula R.sub.1 --A.sub.1 --A.sub.2 --X.sub.1 --A.sub.3 --(CH.sub.2).sub.p --L--A.sub.4 --R.sub.2, in which R.sub.1 is F, CN or straight chain, branched or cyclic alkyl and R.sub.2 is H, F, CH or straight chain or branched alkyl; A.sub.3 is 1,4-phenylene, pyridine-2,5-diyl, pyrimidine-2,5-diyl, pyrazine-2,5-diyl, pyridazine-3,6-diyl, 1,4-cyclohexylene, 1,3-dioxane-2,5-diyl, 1,3-ditiane-2,5-diyl, thiophene-2,5-diyl, thiazole-2,5-diyl, thiaziazole-2,5-diyl, benzoxazole-2,5-diyl, benzoxazole-2,6-diyl, benzothiazole-2,5-diyl, benzothiazole-2,6-diyl, benzofuran-2,5-diyl, benzofuran-2,6-diyl, quinoxaline-2,6-diyl, quinoline-2,6-diyl, 2,6-naphthylene, indane-2,5-diyl, 2-alkylindane-2,5-diyl, indanone-2,6-diyl, 2-alkylindane-2,6-diyl, coumarane-2,5-diyl and 2-alkylcoumarane-2,5-diyl; A.sub.1, A.sub.2 and A.sub.4 are single bond or A.sub.3 ; X.sub.1 ' is a single bond, --COO--, --OCO--, --CH.sub.2 O--, --OCH.sub.2 --, --CH.sub.2 CH.sub.2 --, --CH.dbd.CH-- or --C.tbd.C--; p is an integer from 2 to 20; and L is optically active.

REFERENCES:
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M. Jaladi et al, "A New preparation of furo-2, 3b furans, and conformational studies by 2D NMR", Tetrahedron Lett. vol. 24 (40) pp. 4307-4310, 1983.
CA 104: 88376, 1986.
CA 115 : 91933, 1991.
CA 121: 230420 1994.
M. Schadt & W. Helfrich, "Voltage--dependent optical activity of a twisted nematic liquid crystal", App. Phys. Lett. v. 18 n. 4 Feb. 15, 1971, pp. 127-128.

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