申请人:Hoffmann-La Roche Inc.
公开号:US05032312A1
公开(公告)日:1991-07-16
Compounds of the formula ##STR1## wherein R.sup.1 denotes a group R.sup.3 or R.sup.3 --A.sup.4 --Z.sup.3 -- and R.sup.2 denotes a group R.sup.4 or --Z.sup.4 --A.sup.5 --R.sup.4 ; m and n each individually stand for the number 0 or 1; A.sup.1, A.sup.2, A.sup.3, A.sup.4 and A.sup.5 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, trans-1,4-cyclohexylene in which optionally 2 non-adjacent methylene groups are replaced by oxygen and/or sulphur, 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, Z.sup.3 and Z.sup.4 each independently signify a single covalent bond, --COO--, --OOC--, --CH.sub.2 O--, --OCH.sub.2 --, --CH.sub.2 CH.sub.2, --C.tbd.C--, --(CH.sub.2).sub.3 O--, --O(CH.sub.2).sub.3 -- 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 signifies halogen, cyano or methyl, as well as liquid crystalline mixtures and their use for electro-optical purposes.
化合物的公式为## STR1 ##,其中R.sup.1表示R.sup.3或R.sup.3--A.sup.4--Z.sup.3--基团,R.sup.2表示R.sup.4或--Z.sup.4--A.sup.5--R.sup.4基团; m和n分别代表数字0或1; A.sup.1,A.sup.2,A.sup.3,A.sup.4和A.sup.5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,其中可选地1个CH基团或2个CH基团被氮取代,可选地2个非相邻亚甲基基团被氧和/或硫取代,1-氰基-反式-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; Z.sup.1,Z.sup.2,Z.sup.3和Z.sup.4各自独立地表示单个共价键,--COO--,--OOC--,--CH.sub.2O--,--OCH.sub.2--,--CH.sub.2CH.sub.2,--C.tbd.C--,--(CH.sub.2).sub.3O--,--O(CH.sub.2).sub.3--或--CH.dbd.CH--CH.sub.2O--或--OCH.sub.2--CH.dbd.CH--的反式形式; 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表示卤素,氰基或甲基,以及液晶混合物及其用于电光目的的用途。