申请人:Hoffmann-La Roche Inc.
公开号:US05346647A1
公开(公告)日:1994-09-13
Compounds of the formula ##STR1## wherein n stands for the number 0 or 1; R.sup.1 denotes a group R.sup.3 or R.sup.3 --A.sup.3 --Z.sup.2 -- and R.sup.2 denotes a group R.sup.4 or R.sup.4 --A.sup.4 --Z.sup.3 --; ring A.sup.1 is unsubstituted or halogen-, cyano- and/or methylsubstituted 1,4-phenylene in which optionally 1 CH group or 2 CH groups is/are replaced by nitrogen; A.sup.3 A.sup.4 and ring A.sup.2 each independently represent unsubstituted or halogen-, cyano- and/or methyl- -substituted 1,4-phenylene in which optionally 1 CH group or 2 CH groups is/are replaced by nitrogen or trans-1,4-cyclohexylene, trans-1,3-dioxane-2,5-diyl, 1-cyano-trans-1,4-cyclohexylene, bicyclo[2.2.2]octane- -1,4-diyl, naphthalene-2,6-diyl, tetralin-2,6-diyl or trans-decalin-2,6- diyl; Z.sup.1, Z.sup.2 and Z.sup.3 each independently are a single covalent bond, --COO--, --OOC--, --CH.sub.2 O--, --OCH.sub.2 --, --CH.sub.2 CH.sub.2 --, --C.vertline.C--, --(CH.sub.2).sub.3 O--, --O(CH.sub.2).sub.3 --, --(CH.sub.2).sub.4 -- or the trans form of --CH.dbd.CH-- CH.sub.2 O-- or --OCH.sub.2 --CH.dbd.CH--; R.sup.3 and R.sup.4 each independently denote halogen, cyano, --NCS, --CF.sub.3, --OCF.sub.3 or alkyl in which optionally one >CH--CH< is replaced by >C.dbd.C< and/or optionally one methylene group or two non- adjacent methylene groups is/are replaced by --O--, --COO-- and/or --OOC-- and/or optionally one methylene group is replaced by --CHX--; and X is halogen, cyano or methyl, as well as liquid crystalline mixtures which contain such compounds and their use for electro-optical purposes.
分子式为##STR1##的化合物,其中n代表0或1;R.sup.1表示R.sup.3或R.sup.3--A.sup.3--Z.sup.2--基团,R.sup.2表示R.sup.4或R.sup.4--A.sup.4--Z.sup.3--基团;环A.sup.1是未取代或卤素、氰基和/或甲基取代的1,4-苯撑基,在其中可选地1个CH基团或2个CH基团被氮取代;A.sup.3、A.sup.4和环A.sup.2各自独立地表示未取代或卤素、氰基和/或甲基取代的1,4-苯撑基,在其中可选地1个CH基团或2个CH基团被氮或反-1,4-环己撑基,反-1,3-二氧杂环己烷-2,5-二基,1-氰基-反-1,4-环己撑基,双环[2.2.2]辛烷-1,4-二基,萘-2,6-二基,四氢萘-2,6-二基或反-癸烷-2,6-二基取代1个或2个非相邻甲基基团;Z.sup.1、Z.sup.2和Z.sup.3各自独立地是单一共价键,--COO--,--OOC--,--CH.sub.2O--,--OCH.sub.2--,--CH.sub.2CH.sub.2--,--C.vertline.C--,--(CH.sub.2).sub.3O--,--O(CH.sub.2).sub.3--,--(CH.sub.2).sub.4--或--CH.dbd.CH--的反式形式 CH.sub.2O--或--OCH.sub.2--CH.dbd.CH--;R.sup.3和R.sup.4各自独立地表示卤素、氰基、--NCS、--CF.sub.3、--OCF.sub.3或烷基,其中可选地一个>CH--CH<被>C.dbd.C<取代和/或可选地一个亚甲基基团或两个非相邻亚甲基基团被--O--,--COO--和/或--OOC--取代和/或可选地一个亚甲基基团被--CHX--取代;X是卤素、氰基或甲基,以及包含这种化合物的液晶混合物及其用于电光目的的用途。