申请人:Merck Patent Gesellschaft Mit Beschrankter Haftung
公开号:US04726911A1
公开(公告)日:1988-02-23
Compounds 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 an alkyl group having 1-10 C atoms, in which one or two non-adjacent CH.sub.2 groups can also be replaced by O atoms and/or CO groups and/or --OCO-- groups and/or --COO-- groups and/or --CH.dbd.CH-- groups, or are F, Cl, Br, CN or R.sup.3 --A.sup.3 --Z.sup.2 --, A.sup.1 is --A--, --A.sup.4 --A-- or --A--A.sup.4 --, A is a 1,3-dioxane-2,5-diyl or 1,3-dithiane-2,5-diyl group which is monosubstituted or polysubstituted in the 2-position and/or 4-position by alkyl each having 1-10 C atoms and/or in the 5-position by alkyl, alkoxy, fluorinated alkyl or fluorinated alkoxy each having 1-5 C atoms, or by F, Cl, Br or CN, A.sup.2, A.sup.3 and A.sup.4 each are 1,3-dithiane-2,5-diyl, piperidine-1,4-diyl, 1,4-bicyclo[2,2,2]octylene, decahydronaphthalene-2,6-diyl, 1,2,3,4-tetrahydronaphthalene-2,6-diyl, 1,4-phenylene, 1,4-phenylene which is substituted by one or two F and/or Cl atoms and/or CH.sub.3 groups and/or CN groups and in which one or two CH groups can also be replaced by N atoms, or 1,4-cyclohexylene in which one or two non-adjacent CH.sub.2 groups can also be replaced by O atoms, Z.sup.1 and Z.sup.2 each are --CO--O--, --O--CO--, --CH.sub.2 CH.sub.2 --, --OCH.sub.2 --, --CH.sub.2 O-- or a single bond, and R.sup.3 is H, an alkyl group having 1-10 C atoms, in which one or two non-adjacent CH.sub.2 groups can also be replaced by O atoms and/or --CH.dbd.CH-- groups, or is F, Cl, Br or CN, can be used as components of liquid-crystalline phases.
化合物的化学式为IR.sup.1 --A.sup.1 --Z.sup.1 --A.sup.2 --R.sup.2 I,其中R.sup.1和R.sup.2分别是具有1-10个碳原子的烷基基团,其中一个或两个非相邻的CH.sub.2基团也可以被O原子和/或CO基团以及/或--OCO--基团和/或--COO--基团和/或--CH.dbd.CH--基团替代,或者是F、Cl、Br、CN或R.sup.3 --A.sup.3 --Z.sup.2 --,A.sup.1是--A--、--A.sup.4 --A--或--A--A.sup.4 --,A是1,3-二氧杂环戊烷-2,5-二基或1,3-二硫杂环戊烷-2,5-二基,该基团在2位和/或4位可单取代或多取代为每个具有1-10个碳原子的烷基,或在5位可为每个具有1-5个碳原子的烷基、烷氧基、氟代烷基或氟代烷氧基,或为F、Cl、Br或CN,A.sup.2、A.sup.3和A.sup.4分别为1,3-二硫杂环戊烷-2,5-二基、哌啶-1,4-二基、1,4-双环[2,2,2]辛烷基、去氢萘-2,6-二基、1,2,3,4-四氢萘-2,6-二基、1,4-苯基、1,4-苯基,其中取代有一个或两个F和/或Cl原子和/或CH.sub.3基团和/或CN基团,其中一个或两个CH基团也可以被N原子取代,或者为1,4-环己基,其中一个或两个非相邻的CH.sub.2基团也可以被O原子取代,Z.sup.1和Z.sup.2分别为--CO--O--、--O--CO--、--CH.sub.2 CH.sub.2 --、--OCH.sub.2 --、--CH.sub.2 O--或单键,R.sup.3为H、具有1-10个碳原子的烷基基团,其中一个或两个非相邻的CH.sub.2基团也可以被O原子和/或--CH.dbd.CH--基团取代,或者为F、Cl、Br或CN,可用作液晶相的组分。