申请人:Hoffmann-La Roche Inc.
公开号:US04528114A1
公开(公告)日:1985-07-09
Compounds of the formula ##STR1## wherein ring B stands for 1,4-phenylene or a trans-1,4-disubstituted cyclohexane ring and A stands for a group with 1 to 3 six-membered rings, which together with ring B represents a central group of formulae II-XIII; R.sup.1 signifies a straight-chain alkyl group containing 1 to 9 carbon atoms or when R.sup.1 is attached to a benzene, monofluorinated benzene or pyrimidine, ring R.sup.1 also signifies a straight-chain alkoxy group with 1 to 9 carbon atoms; and R.sup.2 signifies hydrogen, cyano or a straight-chain alkyl group containing 1 to 7 carbon atoms, their manufacture, liquid crystalline mixtures which contain said compounds and their use for electro-optical purposes are described. The compounds of formula I are especially valuable as components in liquid crystal mixtures and for the most part themselves have liquid crystalline properties.
式子为##STR1##的化合物,其中环B代表1,4-苯基或反式1,4-二取代环己烷环,并且A代表一个含有1至3个六元环的基团,与环B一起表示式子II-XIII的中心基团;R1表示含1至9个碳原子的直链烷基或当R1连接苯、单氟苯或嘧啶时,环R1也表示含1至9个碳原子的直链烷氧基;R2表示氢、氰或含1至7个碳原子的直链烷基。描述了它们的制造、液晶混合物中包含这些化合物和它们用于电光目的的用途。公式I的化合物特别有价值作为液晶混合物中的组分,并且它们大部分本身具有液晶性质。