申请人:Merck Patent Gesellschaft Mit Beschrankter Haftung
公开号:US04846998A1
公开(公告)日:1989-07-11
Cyclohexane derivatives of the formula I R.sup.1 --A.sup.1 --Z.sup.1 --A.sup.2 --R.sup.2 I in which 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 --CO--O-- groups and/or --CH.dbd.CH-- groups, one of the radicals R.sup.1 and R.sup.2 also being H, 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 trans-1,4-cyclohexylene group which can be substituted in the 2-, 3-, 5- and/or 6-position one or more times by F and/or Cl and/or Br and/or CN and/or an alkyl group or a fluorinated alkyl group which each have 1-10 C atoms and in which one or two non-adjacent CH.sub.2 groups can also be replaced by 0 atoms and/or --CO-- groups and/or --CO--O-- groups, and which may also be substituted in the 1- and/or 4-position, A.sup.2, A.sup.3 and A.sup.4 are each 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 and in which one or two CH groups can also be replaced by N atoms and/or NO; 1,4-cyclohexylene in which one or two non-adjacent CH.sub.2 groups can also be replaced by 0 atoms; or 1,3-dithiane-2,5-diyl, piperidine-1,4-diyl, 1,4-bicyclo-(2,2,2)octylene, decahydronaphthalene-2,6-diyl or 1,2,3,4-tetrahydronaphthalene-2,6-diyl groups, Z.sup.1 and Z.sup.2 are each --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 (sic), in which one or two non-adjacent CH.sub.2 groups can also be replaced by 0 atoms and/or --CO-- groups and/or --CO--O-- groups and/or CH.dbd.CH-- groups, or is F, Cl, Br or CN, with the proviso that in the case of Z.sup.1 =--CO--O-- A.sup.1 carries no equatorial substituent in the .beta.-position relative to the --CO--O--bridge, are suitable for use as components of liquid-crystalline phases.
公式I中的环己烷衍生物:R.sup.1 --A.sup.1 --Z.sup.1 --A.sup.2 --R.sup.2,其中R.sup.1和R.sup.2均为具有1-10个C原子的烷基,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--基团和/或--CO--O--基团和/或--CH.dbd.CH--基团替换,R.sup.1和R.sup.2中的一个基团也可以是H,F,Cl,Br,CN或R.sup.3--A.sup.3--Z.sup.2--,A.sup.1为--A--,A.sup.4--A--或--A--A.sup.4--,A是可以在2-,3-,5-和/或6-位上被F和/或Cl和/或Br和/或CN和/或具有1-10个C原子的烷基或氟代烷基取代的反-1,4-环己基烷基,其中一个或两个非相邻的CH.sub.2基团也可以被0原子和/或--CO--基团和/或--CO--O--基团替换,也可以在1-和/或4-位上被取代,A.sup.2、A.sup.3和A.sup.4分别为1,4-苯基,未取代或被一个或两个F和/或Cl原子和/或CH.sub.3基和/或CN基取代,其中一个或两个CH基团也可以被N原子和/或NO取代;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0原子取代;或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-2,6-二基或1,2,3,4-四氢萘-2,6-二基基团,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,并且R.sup.3为H,具有1-10(错误,应为1-10个)个烷基,其中一个或两个非相邻的CH.sub.2基团也可以被0原子和/或--CO--基团和/或--CO--O--基团和/或CH.dbd.CH--基团替换,或为F,Cl,Br或CN,但在Z.sup.1 = --CO--O--的情况下,A.sup.1在与--CO--O--桥相对的.beta.-位置上不携带轴向取代基,适用于液晶相的组分。