Pyrimidine derivatives
    15.
    发明授权
    Pyrimidine derivatives 失效
    嘧啶衍生物

    公开(公告)号:US4776973A

    公开(公告)日:1988-10-11

    申请号:US832120

    申请日:1986-02-24

    CPC分类号: C07D239/26 C09K19/3458

    摘要: Pyrimidine derivatives of the formula IR.sup.1 --Pry--A.sup.1 --Z.sup.1 --A.sup.2 -[Z.sup.2 --A.sup.3 ].sub.m --R.sup.2 Iin whichR.sup.1 and R.sup.2 each are an alkyl group having 1 to 12 C atoms, in which one or two non-adjacent CH.sub.2 groups can also be replaced by --O--, --CO--, --O--CO--, --CO--O-- or --CH.dbd.CH--, and one of the radicals R.sup.1 and R.sup.2 are H, F, Cl, Br or CN,Pyr is pyrimidine-2,5-diyl,A.sup.1 and A.sup.3 each are 1,4-cyclohexylene, unsubstituted 1,4-phenylene or 1,4-phenylene which is substituted by one or two F and/or Cl atoms and/or CH.sub.3 and /or CN groups,A.sup.2 is 1,4-phenylene which is unsubstituted or substituted by one or two F and/or Cl atoms and/or CH.sub.3 and/or CN groups,Z.sup.1 is --CH.sub.2 CH.sub.2 --, --CH.sub.2 O--, or --OCH.sub.2 --Z.sup.2 is --CO--O--, --O--CO--, --CH.sub.2 CH.sub.2 --, --CH.sub.2 O--, --O--CH.sub.2 -- or a single bond, andm is 0 or 1,are suitable for preparing liquid crystal phases having steep electro-optical characteristic curves.

    摘要翻译: 式I的嘧啶衍生物R1-Pry-A1-Z1-A2- [Z2-A3] m-R2I,其中R1和R2各自为具有1至12个C原子的烷基,其中一个或两个不相邻的CH2 基团也可以被-O - , - CO-,-O-CO-,-CO-O-或-CH = CH-取代,基团R1和R2之一是H,F,Cl,Br或CN 吡啶是嘧啶-2,5-二基,A1和A3各自为1,4-亚环己基,未被取代的1,4-亚苯基或1,4-亚苯基,其被一个或两个F和/或Cl原子和/或 CH 3和/或CN基团,A2是未被取代或被一个或两个F和/或Cl原子和/或CH 3和/或CN基团取代的1,4-亚苯基,Z 1是-CH 2 CH 2 - , - CH 2 O-或 -OCH 2 - Z 2是-CO-O-,-O-CO-, - CH 2 CH 2 - , - CH 2 O-,-O-CH 2 - 或单键,m是0或1,适用于制备具有 陡峭的电光特性曲线。