Compositions – Liquid crystal compositions – Containing nonsteryl liquid crystalline compound of...
Patent
1987-09-01
1990-04-03
Gron, Teddy S.
Compositions
Liquid crystal compositions
Containing nonsteryl liquid crystalline compound of...
25229901, 2522995, 350350R, 350350S, 546286, 546290, 546298, 546300, 546301, 546302, 546314, 546326, 546328, 546330, 546335, 546339, 546342, G02F 113, C09K 1934, C07D40900, C07D24118
Patent
active
049138375
DESCRIPTION:
BRIEF SUMMARY
The invention relates to heterocyclic compounds of the formula I 1-15 C atoms, wherein one or two nonadjacent CH.sub.2 groups can also be replaced by O atoms and/or --CO-- groups and/or --O--CO-- groups and/or --CO--O-- groups and/or --O--COO-- groups and/or --CHCN-- and/or --CH-- halogen groups, and one of the radicals R.sup.1 and R.sup.2 is also F, Cl, Br or CN, 1,4-cyclohexylene group which is unsubstituted or monosubstituted or polysubstituted by F and/or Cl atoms and/or CH.sub.3 and/or CN groups, wherein one or two non-adjacent CH.sub.2 groups can also be replaced by O atoms and/or S atoms, or a 1,4-bicyclo-(2,2,2)-octylene group or a 1,4 phenylene group which is unsubstituted or monosubstituted or polysubstituted by F and/or Cl atoms and/or CH.sub.3 and/or CN groups, wherein one or more CH groups can also be replaced by N, --O--CO--, --CH.sub.2 CH.sub.2 --, --OCH.sub.2 --, --CH.sub.2 O-- or a single bond, group (Pa) or a pyridine-2,5-diyl group (Py), and Z.sup.2 is not a single bond and/or at least one of the groups A.sup.1, A.sup.2 and A.sup.3 is a laterally substituted 1,4-phenylene group, ##STR1## n=1 and Z.sup.2 =--O--CO--, R.sup.1 and R.sup.2 are each independently of each other a straight-chain alkyl group with 1-15 C atoms, wherein one or two non-adjacent CH.sub.2 groups can also be replaced by 0 atoms and/or --CO-- groups and/or --O--CO-- groups and/or --CO--O-- groups and/or --O--COO-- groups and/or --CHCN-- and/or --CH-halogen groups, one of the radicals R.sup.1 and R.sup.2 is also F, Cl, Br or CN and A.sup.3 is an unsubstituted 1,4-phenylene group, or R.sup.1 and R.sup.2 are each independently of each other a straight-chain or branched alkyl group with 1-15 C atoms, wherein one or two non-adjacent CH.sub.2 groups can also be replaced by O atoms and/or --CO-- groups and/or --O--CO-- groups and/or --CO--O-- groups and/or --O--COO-- groups and/or --CHCN-- and/or --CH-halogen groups, one of the radicals R.sup.1 and R.sup.2 is also F, Cl, Br or CN and A.sup.3 is laterally substituted 1,4-phenylene, and Z.sup.2 is --CH.sub.2 CH.sub.2 --, --CH.sub.2 O-- or --OCH.sub.2 -- and/or at least one of the groups A.sup.1, A.sup.2 and A.sup.3 is laterally substituted and/or at least one of the groups A.sup.1, A.sup.2 and A.sup.3 is trans-1,4-cyclohexylene, wherein one or two non-adjacent CH.sub.2 groups can also be replaced by O atoms and/or S atoms, or is a 1,4-bicyclo-(2,2,2)octylene group, ##STR2## and n=1,
the Z.sup.2 group linked to A.sup.2 is --CH.sub.2 CH.sub.2 -- or --CH.sub.2 O-- or --OCH.sub.2 -- or --(Z.sup.2 --A.sup.3).sub.n --= ##STR3## or --CO--O--A.sup.3 --R.sup.2 or --O--CO--A.sup.3 --R.sup.2, wherein A.sup.3 is laterally substituted 1,4-phenylene or 1,4-cyclohexylene, ##STR4## and n=1, the group linked to A.sup.2 is --CH.sub.2 CH.sub.2 --, or --CH.sub.2 O-- or --OCH.sub.2 -- or --(Z.sup.2 --A.sup.3).sub.n --=--CO--O--A.sup.3 --R.sup.2 or --O--CO--A.sup.3 --R.sup.2, wherein A.sup.3 is laterally substituted 1,4-phenylene or 1,4-cyclo hexylene, A.sup.2 is laterally substituted 1,4-phenylene or --Z.sup.1 --A.sup.2 --R.sup.2 = ##STR5## and R.sup.1 is alkyl, (h) in the case of --A.sup.1 --Z.sup.1 --= ##STR6## n=1 and Z.sup.2 is a single bond, A.sup.2 and A.sup.3 are each unsubstituted or laterally substituted 1,4-phenylene, R.sup.2 is alkoxy and R.sup.1 is alkyl.
For simplicity, in what follows Cy is a 1,4-cyclohexylene group, Dio is a 1,3-dioxane-2,5-diyl group, Dit is a 1,3-dithiane-2,5-diyl group, Bi a 1,4-bicyclo(2,2,2)-octylene group, Phe a 1,4-phenylene group (which, if appropriate, may also be laterally substituted by F, Cl, CH.sub.3 or CN), Pa is a pyrazine-2,5-diyl group and Py is a pyridine-2,5-diyl group.
Similar compounds are known for example from German Pat. No. 2,535,046. The compounds specified therein, unlike the present compounds, contain no pyrazine-2,5-diyl or pyridine-2,5-diyl group.
Similar pyridine compounds are also known for example from JP 60 149,564--A and JP 60 163,865--A. Similar pyrazine compounds are described for example in JP 60 199,882-A.
The compounds of the fo
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Burrow Michael P.
Eidenschink Rudolf
Gray George W.
Lacey David
Toyne Kenneth J.
Gron Teddy S.
Merck Patent Gesellschaft mit beschrankter Haftung
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