Fluorine-containing pyrimidine derivatives
    2.
    发明授权
    Fluorine-containing pyrimidine derivatives 失效
    含氟嘧啶衍生物

    公开(公告)号:US4812258A

    公开(公告)日:1989-03-14

    申请号:US35820

    申请日:1987-04-08

    摘要: Liquid crystalline fluorine-containing pyrimidine compounds have the formula I ##STR1## wherein R.sup.1 and R.sup.2 are H, R, OR or OCOR, and one of them can also be CN or F, or, if A is a covalent bond, also one or both of R.sup.1 and R.sup.2 can be 4-R.sup.4 -phenyl or 4-R-cyclohexyl, wherein R.sup.4 is R, OR, cyano, f or OCOR; wherein R is an alkyl group of 1 to 12 C atoms; R.sup.3 is F or, if one of the radicals R.sup.1 or R.sup.2 is F or 4-fluorophenyl, also H; Z is 1,3-pyrimidin-2,5-diyl; and A is 1,4-phenylene, 1,4-cyclohexylene or a covalent bond.Fluorine-containing pyrimidine compounds are useful components of liquid crystal dielectrics for electro-optical display devices.

    摘要翻译: 液晶含氟嘧啶化合物具有式I的化合物,其中R 1和R 2是H,R,OR或OCOR,它们之一也可以是CN或F,或者如果A是共价键,也可以是一个或 R 1和R 2可以是4-R 4 - 苯基或4-R-环己基,其中R 4是R,OR,氰基,F或OCOR; 其中R是1至12个C原子的烷基; R 3为F,或者如果基团R 1或R 2中的一个为F或4-氟苯基,则为H; Z是1,3-嘧啶-2,5-二基; A是1,4-亚苯基,1,4-亚环己基或共价键。 含氟嘧啶化合物是用于电光显示装置的液晶电介质的有用组分。

    Pyrimidine derivatives
    4.
    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。