Thiadiazole derivatives, process for their preparation, and their use as
precursors for the production of liquid crystals
    5.
    发明授权
    Thiadiazole derivatives, process for their preparation, and their use as precursors for the production of liquid crystals 失效
    噻二唑衍生物,其制备方法及其作为液晶生产的前体的用途

    公开(公告)号:US5847149A

    公开(公告)日:1998-12-08

    申请号:US680898

    申请日:1996-07-16

    摘要: Thiadiazole derivatives of the formula (I) X-B-A.sup.1 -(M.sup.1 -A.sup.2 -).sub.m (M.sup.2 -A.sup.3).sub.n -R.sup.1(I) in which the symbols and indices have the following meanings: X is Cl, Br or I; B is 1,3,4-thiadiazole-2,5-diyl; A.sup.1, A.sup.2 and A.sup.3 are identical or different and are substituted or unsubstituted 1,4-phenylene, pyrazine-2,5-diyl, pyridazine-3,6-diyl, pyridine-2,5-diyl, pyrimidine-2,5-diyl, trans-1,4-cyclohexylene, 1,3,4-thiadiazole-2,5-diyl, 1,3-dioxane-2,5-diyl, 1,3-dithiane-2,5-diyl, 1,3-thiazole-2,4-diyl, 1,3-thiazole-2,5-diyl, thiophene-2,4-diyl, thiophene-2,5-diyl, piperazine-1,4-diyl, piperazine-2,5-diyl, naphthalene-2,6-diyl, bicyclo�2.2.2!octane-1,4-diyl, or 1,3-dioxaborinane-2,5-diyl; M.sup.1 and M.sup.2 are identical or different and are --CO--O--, --O--CO--, --O--CO--O--, --O--CS--O--, --CH.sub.2 --O--, --O--CH.sub.2 --, --CH.dbd.CH--, --C.tbd.C-- or a single bond; R.sup.1 is --O-benzyl, H, an alkyl group having 1 to 12 carbon atoms or an alkoxy group having 1 to 12 carbon atoms; m and n are 0 or 1. The novel compounds allow the synthesis of a wide range of 1,3,4-thiadiazole derivatives, as employed, for example, as components of liquid-crystal mixtures, in a significantly reduced number of synthesis steps.

    摘要翻译: 式(I)X-B-A1-(M1-A2-)m(M2-A3)n -R1(I)的噻二唑衍生物,其中符号和指数具有以下含义:X为Cl,Br或I; B是1,3,4-噻二唑-2,5-二基; A1,A2和A3相同或不同,为取代或未取代的1,4-亚苯基,吡嗪-2,5-二基,哒嗪-3,6-二基,吡啶-2,5-二基,嘧啶-2,5-二基, 二,反-1,4-亚环己基,1,3,4-噻二唑-2,5-二基,1,3-二恶烷-2,5-二基,1,3-二噻烷-2,5-二基, 3-噻唑-2,4-二基,1,3-噻唑-2,5-二基,噻吩-2,4-二基,噻吩-2,5-二基,哌嗪-1,4-二基,哌嗪-2, 双环[2.2.2]辛烷-1,4-二基或1,3-二氧杂硼杂环壬烷-2,5-二基; M 1和M 2相同或不同,为-CO-O-,-O-CO-,-O-CO-O-,-O-CS-O-,-CH2-O-,-O-CH2-, CH = CH-,-C 3BOND C-或单键; R 1为-O-苄基,H为碳原子数1〜12的烷基或碳原子数1〜12的烷氧基。 m和n为0或1.新化合物允许合成宽范围的1,3,4-噻二唑衍生物,例如作为液晶混合物的组分,以显着减少数量的合成步骤 。

    3,4,5-trifluorobenzenes, and their use in liquid-crystal mixtures
    10.
    发明授权
    3,4,5-trifluorobenzenes, and their use in liquid-crystal mixtures 失效
    3,4,5-三氟苯,以及它们在液晶混合物中的应用

    公开(公告)号:US5716543A

    公开(公告)日:1998-02-10

    申请号:US624490

    申请日:1996-04-04

    摘要: A 3,4,5-trifluorobenzene derivatives of formula (I): ##STR1## in which R.sup.1 is a straight-chain or branched alkyl having 1 to 15 carbon atoms in which one or two nonadjacent --CH.sub.2 --groups are optionally replaced by --O--, --CH.dbd.CH--, --C.tbd.C--, cyclopropane-1,2-diyl or --Si(CH.sub.3).sub.2 --, and in which one or more H atoms in the alkyl radical may be substituted by F; A.sup.1, A.sup.2 and A.sup.3 are identical or different 1,4-phenylene, pyridine-2,5-diyl, pyrimidine-2,5-diyl in which one or two H atoms are, optionally, replaced by F, trans-1,4-cyclohexylene, 1,3-dioxane-2,5-diyl or naphthalene-2,6-diyl, M.sup.1 and M.sup.2 are identical or different --CH.sub.2 CH.sub.2 --,--CH.dbd.CH--,--C.tbd.C--,--CH.sub.2 CH.sub.2 CH.sub.2 CH.sub.2 --, --CH.sub.2 --O--,--O--CH.sub.2 --,--CO--O-- or--O--CO; X is --CH.sub.2 --O--,--OCH.sub.2 -- or --O--CO--; and k, l, m, n, o and p are zero or one provided that the sum k+m+o is greater than zero. The substances of the invention are characterized by a good temperature behavior of the nematic phase and good solubility.

    摘要翻译: PCT No.PCT / EP94 / 03212 Sec。 371日期:1996年4月4日 102(e)日期1996年4月4日PCT 1994年9月26日PCT公布。 WO95 / 10498 PCT出版物 日期:1995年04月20日一种式(I)的3,4,5-三氟苯衍生物:其中R 1是具有1至15个碳原子的直链或支链烷基,其中一个或两个不相邻 - CH 2 - 基团任选地被-O - , - CH = CH - , - C 3BOND C - ,环丙烷-1,2-二基或-Si(CH 3)2 - 取代,其中烷基中的一个或多个H原子 基团可以被F取代; A1,A2和A3是相同或不同的1,4-亚苯基,吡啶-2,5-二基,嘧啶-2,5-二基,其中一个或两个H原子任选被F,反式-1,4 环己基,1,3-二恶烷-2,5-二基或萘-2,6-二基,M1和M2相同或不同,-CH2CH2 - , - CH = CH - , - C 3BOND C - , - CH2CH2CH2CH2-, -CH 2 -O - , - O-CH 2 - , - CO-O-或-O-CO; X是-CH 2 -O - , - OCH 2 - 或-O-CO-; 并且k,l,m,n,o和p分别为0或1,条件是和k + m + o大于零。 本发明的物质的特征在于向列相的温度特性良好,溶解性好。