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    • 53. 发明授权
    • Liquid crystalline esters and mixtures
    • 液晶酯和混合物
    • US4550981A
    • 1985-11-05
    • US530830
    • 1983-09-09
    • Martin PetrzilkaMartin SchadtAlois Villiger
    • Martin PetrzilkaMartin SchadtAlois Villiger
    • C07C29/147C07C31/135C07C61/12C07C61/39C07C63/49C07C63/72C07C69/773C07C69/90C07C205/39C07C205/43C07C255/34C07C255/50C07C255/51C09K19/00C09K19/20C09K19/30G02F1/13C07C79/26C07C121/52
    • C07C255/00C07C205/43C07C29/147C07C309/00C07C31/1355C07C61/12C07C61/39C07C63/49C07C63/72C09K19/2007C09K19/3068C07B2200/09C07C2101/14
    • 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 or --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.
    • 其中X 2是单个共价键或-COO-; X 1是单个共价键,-COO - , - CH 2 CH 2 - 或当X 2是-COO-时,X 1也可以是对-C 6 H 4 - ,p-C 6 H 4 -CH 2 CH 2 - , - CH 2 CH 2-p-C 6 H 4,p-C 6 H 4 -CO 2 - 或-COO-p-C6H4; 环A是苯环或反式-1,4-亚环己基; 环B为苯环,或者当X2为-COO-且X1为单一共价键时,可以为-COO-或-CH2CH2-,环B也可为反式-1,4-亚环己基; Z1,Z2和Z3分别为氢或当位于不与另一个环通过单个共价键直接连接的苯环上时,Z 1,Z 2和Z 3也可以是卤素,氰基或甲基; Y2是氰基,硝基,2,2-二氰基乙烯基或当Y1是氢时,Y2也可以是2,2-二氰基-1-甲基乙烯基; Y1是卤素,氰基,C1-C3-烷基,或当X1包括苯环或-COO-或Y2是硝基或Z1和Z2中的至少一个不是氢时,Y1也可以是氢; R1为C1-C12烷基,或者当位于苯环R1上时,也可以是C1-C12-烷氧基,它们在液晶混合物中的制备和应用被描述。