申请人:Hoffmann-La Roche Inc.
公开号:US05242619A1
公开(公告)日:1993-09-07
Optically active compounds of the formula ##STR1## wherein rings A, B and C each independently are unsubstituted or each are 1,4-phenylene substituted with at least one of halogen-, cyano-, methyl- or methoxy in which optionally 1 CH group or 2 CH groups is/are replaced by nitrogen; R.sup.1 is a radical of an optically active terpene alcohol after cleavage of the hydroxy group or a group --(CH.sub.2).sub.m --C*HX.sup.1 --R.sup.3 ; R.sup.2 is a radical of an optically active terpene alcohol after cleavage of the hydroxy group or a group --(CH.sub.2).sub.n --C*HX.sup.2 --R.sup.4 ; m and n each independently stand for the number O or 1: C* denotes a chiral carbon atom; X.sup.1 and X.sup.2 each independently are fluorine, chlorine, cyano, methyl or methoxy; R.sup.3 and R.sup.4 each independently denote a group R, phenyl or phenyl substituted with R, with the proviso that R.sup.3 is different from X.sup.1 and R.sup.4 is different from X.sup.2 ; R is an alkyl group in which optionally one methylene group is replaced by oxygen and/or optionally one group CH--CH is replaced by a group C.dbd.C; with the proviso that R.sup.1 and R.sup.2 are not simultaneously 2-alkyl when rings A, B and C together are p-terphenyl, as well as liquid crystalline mixtures and their use for electro-optical purposes.
该公式的光学活性化合物如下:其中环A、B和C各自独立地未被取代,或者每个环是1,4-苯基取代物,至少有一个卤素、氰基、甲基或甲氧基,其中可以选择地1个CH基团或2个CH基团被氮取代;R^1是光学活性萜醇的基团,在羟基裂解后或者一个基团--(CH_2)_m--C*HX^1--R^3;R^2是光学活性萜醇的基团,在羟基裂解后或者一个基团--(CH_2)_n--C*HX^2--R^4;m和n各自独立地代表数字0或1:C*表示一个手性碳原子;X^1和X^2各自独立地是氟、氯、氰基、甲基或甲氧基;R^3和R^4各自独立地表示一个基团R、苯基或取代R的苯基,但R^3与X^1不同,R^4与X^2不同;R是一个烷基基团,其中可以选择地一个亚甲基基团被氧取代和/或可以选择地一个基团CH--CH被一个基团C.dbd.C取代;但R^1和R^2不同时为2-烷基,当环A、B和C共同为对联苯时,以及液晶混合物及其用于电光目的。