Cyclopropylaklyl or -alkenyl or heterocyclic compounds, process

Details Cyclopropylaklyl or -alkenyl or heterocyclic compounds, process Cyclopropylaklyl or -alkenyl or heterocyclic compounds, process

1993-10-04

1995-04-18

Wu, Shean

Compositions

Liquid crystal compositions

25229961, 25229963, 25229964, 25229965, 25229967, 544229, 544242, 544298, 544335, C09K 1952, C09K 1934, C07D23926

Patent

active

054075998

ABSTRACT:
Disclosed and claimed are liquid-crystalline cyclopropylalkyl or -alkenyl or heterocyclic compounds, process for their preparation, and their use in liquid-crystalline mixtures. The novel cyclopropylalkyl or -alkenyl or heterocyclic compounds are of the general formula ##STR1## In this formula A.sup.1, A.sup.2 and A.sup.3 are unsubstituted or substituted, aromatic or heteroaromatic molecular components such as 1,4-phenylene or pyrimidine-2,5-diyl which are linked via a single bond (in the case where k and m=0) or via functional groups M.sup.1 and M.sup.2, such as CO--O or CH.sub.2 --O; j, k, l, m and n are zero, 1 or 2. The radicals R.sup.2, R.sup.3 and R.sup.4 are H or alkyl/alkenyl, R.sup.1 is alkyl/alkenyl or one of the substitutents known from LC chemistry such as an .alpha.-haloalkanoic acid radical. At least one of the components A.sup.1, A.sup.2 and A.sup.3 can be heteroaromatic, and G is alkylene or alkenylene.

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