Process for stabilizing 4-halopyridines
    3.
    发明授权
    Process for stabilizing 4-halopyridines 有权
    稳定4-卤代吡啶的方法

    公开(公告)号:US07538227B2

    公开(公告)日:2009-05-26

    申请号:US11035142

    申请日:2005-01-13

    IPC分类号: C07D211/72

    CPC分类号: C07D213/68 C07D213/61

    摘要: The present invention relates to a process for stabilizing 4-halopyridines of the formula (I) by adding a secondary and/or aliphatic or mixed aliphatic-aromatic tertiary amine, and mixtures comprising a compound of the formula (I) and a secondary and/or tertiary amine.

    摘要翻译: 本发明涉及通过加入仲和/或脂族或混合的脂族 - 芳族叔胺,以及包含式(I)化合物和二级和/或其混合脂族 - 芳族叔胺的混合物来稳定式(I)的4-卤代吡啶的方法, 或叔胺。

    Smectic liquid-crystal mixture
    6.
    发明授权
    Smectic liquid-crystal mixture 失效
    近晶液晶混合物

    公开(公告)号:US5529718A

    公开(公告)日:1996-06-25

    申请号:US278059

    申请日:1994-07-20

    摘要: A smectic liquid-crystal mixture containing rod-shaped molecules having only one side chain and certain phenylpyrimidine derivatives. The liquid-crystal mixtures according to the invention are distinguished by a low melting point and a high S.sub.C /S.sub.A phase-transition temperature. The use of bisesters of the formula I allows the number of phenylpyrimidine derivatives in the mixtures according to the invention to be significantly reduced. Ferroelectric mixtures according to the invention have, in particular, high contrast, good alignment, a large margin, low flicker and a large angle in the chevron geometry.

    摘要翻译: 含有仅具有一个侧链的棒状分子和某些苯基嘧啶衍生物的近晶液晶混合物。 根据本发明的液晶混合物的特征在于低熔点和高SC / SA相转变温度。 式I的双酚A的使用使得根据本发明的混合物中苯基嘧啶衍生物的数量显着降低。 根据本发明的铁电混合物尤其具有高对比度,良好的对准,大的边缘,低闪烁和大的角度的人字形几何形状。

    Process for preparing highly pure enantiomers of oxirane alcohols
    7.
    发明授权
    Process for preparing highly pure enantiomers of oxirane alcohols 失效
    制备环氧乙烷醇高纯度对映异构体的方法

    公开(公告)号:US5478954A

    公开(公告)日:1995-12-26

    申请号:US98510

    申请日:1993-07-28

    申请人: Javier Manero

    发明人: Javier Manero

    摘要: Process for preparing highly pure enantiomers of oxirane alcohols, which comprises recrystallizing a mixture of the isomeric oxirane alcohols, in which the desired enantiomer is present in an excess of at least 60% ee, in a solvent or solvent mixture at a temperature just below the melting point of the oxirane alcohol.Oxirane alcohols prepared according to the invention are distinguished by high enantiomer purity. Ferroelectric liquid crystals, which contain highly pure enantiomers of oxirane alcohols according to the invention and/or derivatives derived therefrom, have particularly short switching times.

    摘要翻译: 制备环氧乙烷醇的高纯度对映异构体的方法,其包括将所需对映异构体以过量至少60%ee存在的异构体环氧乙烷醇的混合物在溶剂或溶剂混合物中,在刚好低于 环氧乙烷醇的熔点。 根据本发明制备的环氧乙烷醇的特征在于高对映体纯度。 含有根据本发明的环氧乙烷醇的高纯度对映异构体和/或由其衍生的衍生物的铁电液晶具有特别短的开关时间。

    1-fluor-5,6,7,8-tetrahydroisoquinoline derivatives, and their use in
liquid-crystal line mixtures
    10.
    发明授权
    1-fluor-5,6,7,8-tetrahydroisoquinoline derivatives, and their use in liquid-crystal line mixtures 失效
    1-氟-5,6,7,8-四氢异喹啉衍生物及其在液晶线混合物中的应用

    公开(公告)号:US5942618A

    公开(公告)日:1999-08-24

    申请号:US952125

    申请日:1997-11-06

    摘要: 1-Fluoro-5,6,7,8-tetrahydroisoquinoline derivatives, and their use in liquid-crystalline mixtures1-Fluoro-5,6,7,8-tetrahydroisoquinoline derivatives of the formula (I)R.sup.1 ( --M.sup.1).sub.a (--A.sup.1 --M.sup.2).sub.b (--A.sup.2 --M.sup.3).sub.c --B(--M.sup.4 --A.sup.3).sub.d (--M.sup.5 --A.sup.4).sub.e (--M.sup.6 .sub.f --R.sup.2 (I)in which the symbols and indices have the following meanings:the group B is ##STR1## R.sup.1 and R.sup.2 are, for example, alkyl radicals having 1 to 20 carbon atoms;M.sup.1, M.sup.2, M.sup.3, M.sup.4, M.sup.5 and M.sup.6 are, for example, --O--, --CO--O--, --O--CO-- or a single bond;A.sup.1, A.sup.2, A.sup.3 and A.sup.4 are, for example, 1,4-phenylene, pyrimidine-2,5-diyl or trans-1,4-cyclohexylene, anda, b, c, d, e and f are zero or one, with the proviso that the sum of b, c, d and e is 0, 1 or 2.The compounds of the formula (I) are colorless in the pure state and generally form liquid-crystalline mesophases in a temperature range which is favorably located for electro-optical use. They are stable chemically, thermally and to light.

    摘要翻译: PCT No.PCT / EP96 / 01995 371日期:1997年11月6日 102(e)日期1997年11月6日PCT提交1996年5月10日PCT公布。 出版物WO96 / 35675 日期:1961年11月14日 - 氟-5,6,7,8-四氢异喹啉衍生物及其在液晶混合物中的用途式(I)的1-氟-5,6,7,8-四氢异喹啉衍生物R1( -M1)a(-A1-M2)b(-A2-M3)cB(-M4-A3)d(-M5-A4)e(-M6f-R2(I)其中符号和指数具有以下含义 基团B为R 1,R 2为例如具有1〜20个碳原子的烷基; M 1,M 2,M 3,M 4,M 5,M 6为例如-O - , - CO-O - , - O -CO-或单键; A1,A2,A3和A4是例如1,4-亚苯基,嘧啶-2,5-二基或反式-1,4-亚环己基,和a,b,c,d ,e和f为零或一个,条件是b,c,d和e的和为0,1或2.式(I)化合物在纯状态下为无色,通常形成液晶 中等相位在有利于电光学使用的温度范围内,它们化学稳定,耐热和耐光稳定。