申请人:Merck Patent Gesellschaft mit beschrankter Haftung
公开号:US04755323A1
公开(公告)日:1988-07-05
New 1,4-dioxanes of the formula I ##STR1## wherein R.sup.1 and R.sup.2 each signify and alkyl group with 1 - 10 C-atoms, wherein one or two CH.sub.2 groups can also be replaced by O-atoms, F, Cl, Br or CN, R.sup.2 also H, A.sup.1 and A.sup.2 each signify 1,4-phenylene, 1,4-cyclohexylene, 1,3-dioxane-2,5-diyl, 1,4-dioxane-2,5-diyl, peperidine-1,4-diyl, 1,4-bicyclo(2,2,2)-octylene or pyrimidine-2,5-diyl groups, unsubstituted or substituted by 1 - 4 F-atoms, Z.sup.1 and Z.sup.2 each signify --CO--O--, --O--CO--, CH.sub.2 CH.sub.2 --, OCH.sub.2 -- --CH.sub.2 O-- or a single bond, m and n each signify 0, 1, 2 or 3, (m+n), however, are at least 1 and at most 3, whereby for m=2 or 3, the groups A.sup.1 and for n=2 or 3 the groups A.sup.2 can each be the same or different from one another, as well as the acid-addition salts of the basic ones of these compounds, are suitable for use as components of liquid-crystalline dielectrics.
公式I的新1,4-二噁烷,其中R.sup.1和R.sup.2各表示具有1-10个碳原子的烷基基团,其中一个或两个CH.sub.2基团也可以被O原子,F,Cl,Br或CN取代,R.sup.2还可以是H,A.sup.1和A.sup.2各表示1,4-苯基,1,4-环己基,1,3-二噁烷-2,5-二基,1,4-二噁烷-2,5-二基,哌啶-1,4-二基,1,4-双环(2,2,2)-辛烯基或嘧啶-2,5-二基基团,未取代或取代1-4个F原子,Z.sup.1和Z.sup.2各表示--CO--O--,--O--CO--,CH.sub.2 CH.sub.2 --,OCH.sub.2 -- --CH.sub.2 O--或单键,m和n各表示0、1、2或3,(m+n),但至少为1且最多为3,当m=2或3时,A.sup.1组,当n=2或3时,A.sup.2组可以相同也可以不同,以及这些化合物的碱盐酸盐,适用于用作液晶介质的组分。