申请人:Hoffmann-LaRoche Inc.
公开号:US04770503A1
公开(公告)日:1988-09-13
Compounds of the formula ##STR1## wherein m stands for a whole number of 4-7 and n stands for 0 or a positive whole number; ring A represents trans-1,4-cyclohexylene or a 2,5-disubstituted pyrimidine ring; Z signifies a single covalent bond or, insofar as ring A represents trans-1,4-cyclohexylene, also the ethylene group --CH.sub.2 CH.sub.2 --; X denotes hydrogen or fluorine; and R represents the group --NCS or --CN, their manufacture, liquid crystalline mixtures which contain these compounds and the use of these compounds and mixtures for electro-optical purposes are described.
本发明涉及化合物,其化学式为##STR1##其中m代表4-7的整数,n代表0或正整数;环A代表trans-1,4-环己烯基或2,5-二取代嘧啶环;Z表示单个共价键或者,如果环A代表trans-1,4-环己烯基,则还包括乙烯基--CH.sub.2 CH.sub.2 --;X表示氢或氟;R代表基团--NCS或--CN;本发明还涉及这些化合物的制备方法、含有这些化合物的液晶混合物以及这些化合物和混合物在电光领域的应用。