Cyclohexane derivatives

Abstract

New cyclohexane derivatives of the formula I R.sup.1 --A.sup.1 --Z.sup.1 --A.sup.2 --R.sup.2 I wherein R.sup.1 and R.sup.2 are each H, an unsubstituted or substituted alkyl group with 1-15 C atoms, it also being possible for one or two non-adjacent CH.sub.2 groups to be replaced by at least one grouping from the group comprising --O--, --CO--, --O--CO--, --CO--O--, --C.tbd.C--, --CH.dbd.CH--, --S--, --SO-- and --SO.sub.2 --, F, Cl, Br, CN or R.sup.3 --(A.sup.3).sub.p --Z.sup.2 --, A.sup.1 is --A--, --A.sup.4 --Z.sup.3 --A-- or --A--Z.sup.3 --A.sup.4 --, A is a 1,4-cyclohexylene group which is substituted in the 1- and/or 4-position by unsubstituted or substituted alkyl or fluorinated alkyl with in each case 1-5 C atoms, it also being possible for one or two non-adjacent CH.sub.2 groups to be replaced by one grouping from the group comprising --O--, --CO--, --O--CO--, --CO--O--, --C.tbd.C--, --CH.dbd.CH--, --S--, --SO-- and --SO.sub.2 --, or by F, Cl, Br, CN and/or --CHO, and which can carry 1 or 2 further substituents, A.sup.2, A.sup.3 and A.sup.4 in each case denote 1,4-phenylene which is unsubstituted or substituted by one or two F and/or Cl atoms and/or CH.sub.3 groups and/or CN groups, it also being possible for one or two CH groups to be replaced by N atoms, 1,4-cyclohexylene, it also being possible for one or two non-adjacent CH.sub.2 groups to be replaced by O atoms, 1,4-cyclo-1-enyl, 1,3-dithiane-2,5-diyl, piperidine-1,4-diyl, 1,4-bicyclo(2,2,2)-octylene, unsubstituted or CN-substituted decahydronaphthalene-2,6-diyl or 1,2,3,4-tetrahydronaphthalene-2,6-diyl or --A--, Z.sup.1, Z.sup.2 and Z.sup.3 each are --CO--O--, --O--CO--, --OCH.sub.2 --, --CH.sub.2 O--, --CH.sub.2 CH.sub.2 --, substituted ethylene or a single bond, R.sup.3 is H, an unsubstituted or substituted alkyl group with 1-15 C atoms, it also being possible for one or two non-adjacent CH.sub.2 groups to be replaced by a grouping from the group comprising --O--, --CO--, --O--CO--, --CO--O--, --C.tbd.C--, --CH.dbd.CH--, --S--, --SO-- and --SO.sub.2 --, F, Cl, Br or CN and p is 1 or 2, and, if p=2, the groups A.sup.3 can be identical or different, and the acid addition salts of the basic compounds of this type, are suitable for use as components of liquid crystal dielectrics.

Dependencies are inferred from the claim text.