申请人:Merck Patent Gesellschaft mit beschrankter Haftung
公开号:US05454975A1
公开(公告)日:1995-10-03
Cyanopyrimidine derivatives of formula I ##STR1## in which R.sup.1 is an unsubstituted or at least mono-halogen-substituted alkyl or alkoxy radical having 1 to 15 carbon atoms, where one or more CH.sub.2 groups in these radicals may also, in each case independently of one another, be replaced by --CH.dbd.CH--, --O--, --S--, ##STR2## --CO--, --CO--O--, --O--CO-- or --O--CO--O-- in such a way that oxygen atoms are not linked directly to one another, X.sup.1, Y.sup.1 and Z.sup.1 are each, independently of one another, N or CF, X.sup.2, Y.sup.2 and Z.sup.2 are each, independently of one another, N, CF or CH, and n is 0, 1 or 2, with the proviso that at least one of the groups X.sup.1, Y.sup.1 and Z.sup.1 is N, can be used as components of liquid-crystalline media for electro-optical displays.
公式I中的氰基嘧啶衍生物 ##STR1## 其中R.sup.1是未取代或至少单卤素取代的1至15个碳原子的烷基或烷氧基基团,其中这些基团中的一个或多个CH.sub.2基团也可以独立地被--CH.dbd.CH--, --O--, --S--, ##STR2## --CO--, --CO--O--, --O--CO--或--O--CO--O--替换,以使氧原子不直接连接在一起,X.sup.1、Y.sup.1和Z.sup.1各自独立地为N或CF,X.sup.2、Y.sup.2和Z.sup.2各自独立地为N、CF或CH,n为0、1或2,但必须至少有一个X.sup.1、Y.sup.1和Z.sup.1为N,可用作电光显示的液晶介质组分。