申请人:Hoffman-La Roche Inc.
公开号:US04708441A1
公开(公告)日:1987-11-24
Compounds of the formula ##STR1## wherein X.sup.2 is a single covalent bond or --COO--; X.sup.1 is a single covalent bond, --COO--, --CH.sub.2 CH.sub.2 -- or when X.sup.2 is --COO--, X.sup.1 also can be p--C.sub.6 H.sub.4 --, p--C.sub.6 H.sub.4 --CH.sub.2 CH.sub.2 --, --CH.sub.2 CH.sub.2 --p--C.sub.6 H.sub.4, p--C.sub.6 H.sub.4 --COO-- or --COO--p--C.sub.6 H.sub.4 ; ring A is a benzene ring or trans-1,4-cyclohexylene; ring B is a benzene ring or when X.sup.2 is --COO-- and X.sup.1 is a single covalent bond, --COO-- or --CH.sub.2 CH.sub.2 --, ring B also can be trans-1,4-cyclohexylene; Z.sup.1, Z.sup.2 and Z.sup.3 individually are hydrogen or when positioned on a benzene ring which is not linked directly with a further ring via a single covalent bond, Z.sup.1, Z.sup.2 and Z.sup.3 also can be halogen, cyano or methyl; Y.sup.2 is cyano, nitro, 2,2-dicyanovinyl or when Y.sup.1 is hydrogen Y.sup.2 also can be 2,2-dicyano-1-methylvinyl; Y.sup.1 is halogen, cyano, C.sub.1 -C.sub.3 -alkyl or, when X.sup.1 includes a benzene ring of --COO-- or Y.sup.2 is nitro or at least one of Z.sup.1 and Z.sup.2 is other than hydrogen, Y.sup.1 also can be hydrogen; and R.sup.1 is C.sub.1 -C.sub.12 -alkyl or when positioned on a benzene ring R.sup.1 also can be C.sub.1 -C.sub.12 -alkoxy, their manufacture and use in liquid crystalline mixtures are described.
化合物的化学式为 ##STR1## 其中 X.sup.2 是单个共价键或--COO--; X.sup.1 是单个共价键,--COO--,--CH.sub.2 CH.sub.2 --或当 X.sup.2 为--COO--时,X.sup.1 也可以是p--C.sub.6 H.sub.4 --,p--C.sub.6 H.sub.4 --CH.sub.2 CH.sub.2 --,--CH.sub.2 CH.sub.2 --p--C.sub.6 H.sub.4,p--C.sub.6 H.sub.4 --COO--或--COO--p--C.sub.6 H.sub.4; 环A是苯环或反-1,4-环己烷基; 环B是苯环或当X.sup.2为--COO--且X.sup.1是单个共价键,--COO--或--CH.sub.2 CH.sub.2 --时,环B也可以是反-1,4-环己烷基; Z.sup.1,Z.sup.2和Z.sup.3分别是氢或当位于不通过单个共价键直接与另一个环相连的苯环上时,Z.sup.1,Z.sup.2和Z.sup.3也可以是卤素,氰基或甲基; Y.sup.2是氰基,硝基,2,2-二氰基乙烯基或当Y.sup.1为氢时,Y.sup.2也可以是2,2-二氰基-1-甲基乙烯基; Y.sup.1是卤素,氰基,C.sub.1-C.sub.3烷基或当X.sup.1包括--COO--的苯环或Y.sup.2为硝基或至少有一个Z.sup.1和Z.sup.2不是氢时,Y.sup.1也可以是氢; R.sup.1是C.sub.1-C.sub.12烷基或当位于苯环上时,R.sup.1也可以是C.sub.1-C.sub.12烷氧基。描述了它们的制造和在液晶混合物中的使用。