Liquid crystal compounds having a terminal alkoxy propenyl group

Details Liquid crystal compounds having a terminal alkoxy propenyl group Liquid crystal compounds having a terminal alkoxy propenyl group

1991-08-06

1994-02-22

Stoll, Robert L.

Compositions

Liquid crystal compositions

Containing nonsteryl liquid crystalline compound of...

25229961, 25229966, 568631, 568647, 568667, 568669, 558416, 558425, 570129, 544298, 544224, 359103, C09K 1930, C09K 1934, C09K 1912, C07C 4100

Patent

active

052884287

ABSTRACT:
Compounds having a terminal alkyloxypropenyl group of the general formula ##STR1## wherein rings A.sup.1 and A.sup.2 each independently represent unsubstituted or halogen-substituted 1,4-phenylene, in which optionally 1 CH group or 2 CH groups is/are replaced by nitrogen, or trans-1,4-cyclohexylene or trans-1,3-dioxane-2,5-diyl; n is either 0 or 1; Z.sup.1 and Z.sup.2 each independently signify a single covalent bond or --CH.sub.2 CH.sub.2 --, --COO--, --OOC--, --OCH.sub.2 --, --CH.sub.2 O--, --(CH.sub.2).sub.4 --, --O(CH.sub.2).sub.3 --, --(CH.sub.2).sub.3 O--, the trans form of --O--CH.sub.2 --CH.dbd.CH--, --CH.dbd.CH--CH.sub.2 --O--, --(CH.sub.2).sub.2 CH.dbd.CH-- or --CH.dbd.CH--(CH.sub.2).sub.2 --; R.sup.1 denotes an alkyl group; R.sup.2 represents halogen, cyano, trifluoroacetyl, optionally fluorine-substituted alkyl with 1 to 12 carbon atoms, in which optionally 1 --CH.sub.2 -- group or 2 non-adjacent --CH.sub.2 -- groups is/are replaced by oxygen and/or a --CH.sub.2 CH.sub.2 -- group is replaced by -- CH.dbd.CH--,
their manufacture, liquid crystalline mixtures which contain these compounds as well as their use for electro-optical purposes.

REFERENCES:
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