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中的新1,4-二噁烷化合物,其中R1和R2分别表示1-10个碳原子的烷基,其中一个或两个CH2基团也可以被O原子、F、Cl、Br或CN取代,R2还可以是H、A1和A2,每个都表示1,4-苯撑基、1,4-环己撑基、1,3-二氧杂环戊烷-2,5-二基、1,4-二氧杂环戊烷-2,5-二基、哌啶-1,4-二基、1,4-双环[2,2,2]-辛撑基或嘧啶-2,5-二基基团,未取代或取代1-4个F原子,Z1和Z2分别表示--CO--O--、--O--CO--、CH2CH2--、OCH2--、--CH2O--或单键,m和n分别表示0、1、2或3,但(m+n)至少为1且最多为3,当m=2或3时,A1基团,当n=2或3时,A2基团可以相同或不同,这些化合物的碱盐酸盐适用于液晶介质的组分。