Back to results
US 5,961,880 AGranted
1,3-dioxane derivatives having axial fluorine substitution
AssigneeMerck Patent GmbH
InventorsPeer Kirsch, Kazuaki Tarumi, Joachim Krause
Life of this patent
Estimating the term…
Abstract
1,3-Dioxane compounds of the formula I R.sup.1 --(A.sup.1 --Z.sup.1).sub.m --W--(Z.sup.2 --A.sup.2).sub.n --R.sup.2(I) in which W is ##STR1## and R.sup.1, R.sup.2, A.sup.1, A.sup.2, Z.sup.1, Z.sup.2, m, n, ##STR2## n.sub.1, n.sup.2, n.sub.3, n.sub.4, n.sub.5, n.sub.6, Z.sup.3 and Z.sup.4 are as defined herein, are suitable as components of liquid-crystalline media.
Claims12
A 1,3-dioxane compound having axial fluorine substitution, of the formula I
- R.sup.1 --(A.sup.1 --Z.sup.1).sub.m --W--(Z.sup.2 --A.sup.2).sub.n --R.sup.2(I)
- in which
- W is ##STR178## where ##STR179## are each, independently of one another, ##STR180## n.sub.1, n.sub.2 and n.sub.3 are each, independently of one another, 0 or 1,
- provided that one of the groups ##STR181## must be ##STR182## and another of these groups must simultaneously be ##STR183## are each, independently of one another, ##STR184## n.sub.4, n.sub.5 and n.sub.6 are each, independently of one another, 0or 1,
- provided that one of the groups ##STR185## must be ##STR186## R.sup.1 and R.sup.2 are each, independently of one another, an alkyl or alkenyl radical having 1 to 12 carbon atoms which is unsubstituted, monosubstituted by CN or CF.sub.3 or at least monosubstituted by halogen, where one or more CH.sub.2 groups in these radicals are optionally replaced, independently of one another, by --O--, --S--, --CO--, --CO--O--, --O--CO-- or --O--CO--O-- in such a way that hetero atoms are not linked directly to one another,
- R.sup.2 is alternatively F, Cl or CN;
- A.sup.1 and A.sup.2 are each, independently of one another,
- a) a trans-1,4-cyclohexylene radical in which, in addition, one or more non-adjacent CH.sub.2 groups are optionally replaced by --O-- and/or --S--,
- b) a 1,4-cyclohexenylene radical,
- c) a 1,4-phenylene radical, in which, in addition, one or two CH groups may be replaced by N, or
- d) a radical selected from the group consisting of 1,4-bicyclo2.2.2!octylene, piperidine-1,4-diyl, naphthalene-2,6-diyl, decahydronaphthalene-2,6-diyl and 1,2,3,4-tetrahydronaphthalene-2,6-diyl,
- where the radicals a), b) and c) are optionally substituted by CN or F;
- Z.sup.1, Z.sup.2, Z.sup.3
- and Z.sup.4 are each, independently of one another,
- --CO--O--, --O--CO--, --CH.sub.2 O--, --OCH.sub.2 --, --CH.sub.2 CH.sub.2 --, --CH.dbd.CH--, --C.tbd.C-- or a single bond;
- and
- m and n are each, independently of one another,
- 0. 1, 2 or 3;
- provided that n.sub.1 +n.sub.2 +n.sub.3 +m+n=2, 3 or 4, and n.sub.4 +n.sub.5 +n.sub.6 +m+n=1, 2, 3 or 4.
16 more elements
Dependencies are inferred from the claim text.