申请人:Merck Patent Gesellschaft mit beschrankter Haftung
公开号:US05209868A1
公开(公告)日:1993-05-11
Disclosed are trifluoromethylcyclohexane derivatives of the formula I ##STR1## wherein R is an alkyl or alkenyl radical having up to 18 C atoms which is unsubstituted or substituted by CN or by at least one halogen, and in which one or more non-adjacent CH.sub.2 groups may be replaced by a radical selected from the group comprising --O--, --S--, --CO--, --O--CO--, --CO--O-- and --C.tbd.C--, A.sup.1 and A.sup.2 are each, independently of one another, a) a 1,4-phenylene radical, in which one or two CH groups may be replaced by N, b) a 1,4-cyclohexylene radical, in which one or two non-adjacent CH.sub.2 groups may be replaced by --O-- or --S--, c) a 1,4-cyclohexenylene, piperidine-1,4-diyl, 1,4-bicyclo[2,2,2]-octylene or naphthalene-2,6-diyl radical, it being possible for the radicals a) and b) to be monosubstituted or polysubstituted by halogen atoms or cyano and/or methyl groups, ##STR2## Z.sup.1 and Z.sup.2 are each, independently of one another, --CO--O--, --O--CH--, --CH.sub.2 CH.sub.2 --, --CH(CN)--CH.sub.2 --, --CH.sub.2 --CH(CN)--, --CH.dbd.CH--, --OCH .sub.2 --, --CH.sub.2 O--, --CH.dbd.N--, --N.dbd.CH--, --NO.dbd.N--, --N.dbd.NO--, --N.dbd.N-- or a single bond, and o is 0, 1 or 2. These compounds can be used as components of liquid-crystalline media for electrooptical display elements, in particular for matrix liquid-crystal displays.
本发明涉及公式I的三
氟甲基环己烷衍
生物:其中R是一种具有最多18个C原子的烷基或烯基基团,该基团未被取代或被CN或至少一个卤素取代,并且其中一个或多个非相邻
CH2基团可以被从以下组中选择的基团替换:-O-,-S-,-CO-,-O-CO-,-CO-O-和-C.tbd.C-,A1和A2各自独立地为:a)1,4-苯基基团,其中一个或两个CH基团可以被N替换,b)1,4-环己基基团,其中一个或两个非相邻的 基团可以被-O-或-S-替换,c)1,4-
环己烯基,
哌啶-1,4-二基,1,4-双环[2,2,2]-辛基或
萘-2,6-二基基团,基团a)和b)可以被卤素原子或
氰基和/或甲基基团单取代或多取代,Z1和Z2各自独立地为:-CO-O-,-O-CH-,- -,-CH(CN)- -,- -CH(CN)-,-CH.dbd.CH-,-O -,- O-,-CH.dbd.N-,-N.dbd.CH-,-NO.dbd.N-,-N.dbd.NO-,-N.dbd.N-或单键,并且o为0、1或2。这些化合物可用作液晶媒介物的组分,用于电光显示元件,特别是用于矩阵液晶显示器。