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    Process for the production and recovery of halonitroalkanes in high yield
    241.
    发明授权
    Process for the production and recovery of halonitroalkanes in high yield 失效
    以高产量生产和回收卤代硝基烷烃的方法

    公开(公告)号：US5180859A

    公开(公告)日：1993-01-19

    申请号：US910005

    申请日：1992-07-07

    Applicant: Larry D. Timberlake ,  James L. Brennan

    Inventor： Larry D. Timberlake ,  James L. Brennan

    IPC: C07C201/12 ,  C07C201/16 ,  C07C205/08

    CPC classification number: C07C201/16 ,  C07C201/12

    Abstract: A process for the preparation of halonitroalkanes, e.g. bromonitromethane, is disclosed in which a nitroalkane is reacted with an alkali metal base or an alkaline earth metal base, and the resulting nitroalkane salt is halogenated to form the halonitroalkane in a reaction mixture. The process is improved by acidifying the reaction mixture, preferably to pH=0-4, and thereafter recovering the halonitroalkane by azeotropic distillation of the reaction mixture. The acidification step increases the amount of halonitroalkane recovered, as compared to prior art processes in which the reaction mixture is distilled without prior acidification.

    Abstract translation: 一种制备卤代硝基烷烃的方法，例如 溴硝基甲烷，其中硝基烷烃与碱金属碱或碱土金属碱反应，并将所得的硝基烷烃卤化以在反应混合物中形成卤代硝基烷烃。 通过酸化反应混合物，优选至pH = 0-4，然后通过反应混合物的共沸蒸馏回收卤代硝基烷烃来改进该方法。 与现有技术的方法相比，酸化步骤增加了所回收的卤代硝基烷烃的量，其中在没有预先酸化的情况下蒸馏反应混合物。

    Benzylether derivatives
    242.
    发明授权
    Benzylether derivatives 失效
    苄醚衍生物

    公开(公告)号：US5162583A

    公开(公告)日：1992-11-10

    申请号：US588996

    申请日：1990-09-27

    Applicant: Takafumi Shida ,  Hideo Arabori ,  Takeo Watanabe ,  Yoshikazu Kubota ,  Isao Ichinose ,  Yoichi Kanda ,  Shiro Yamazaki ,  Hiroyasu Shinkawa

    Inventor： Takafumi Shida ,  Hideo Arabori ,  Takeo Watanabe ,  Yoshikazu Kubota ,  Isao Ichinose ,  Yoichi Kanda ,  Shiro Yamazaki ,  Hiroyasu Shinkawa

    IPC: A01N43/653 ,  C07C201/12 ,  C07C205/33 ,  C07C205/34 ,  C07C205/35 ,  C07C217/76 ,  C07D249/10

    CPC classification number: A01N43/653 ,  C07C205/33 ,  C07C205/34 ,  C07C205/35 ,  C07C217/76 ,  C07D249/10

    Abstract: Disclosed herein are the derivative of benzyl ether represented by the formula (I) ##STR1## which is useful as an intermediate compound of the derivatives of 1,5-diphenyl-1H-1,2,4- triazole-3-carboxamide represented by the formula (II), ##STR2## wherein R is a straight-chain alkyl group having 1 to 10 carbon atoms which is non-substituted or substituted with 1 to 19 fluorine atoms, a branched alkyl group having 3 to 10 carbon atoms which is non-substituted or substituted with 1 to 19 fluorine atoms, a cyclic alkyl group having 3 to 10 carbon atoms, an alkyl group having 1 to 3 carbon atoms which is substituted with an alicyclic structure having 3 to 7 carbon atoms, a phenyl group or an aralkyl group having 7 to 9 carbon atoms; X.sup.1 is a halogen or an alkyl group having 1 to 3 carbon atoms; X.sup.2 is a hydrogen, a halogen or an alkyl group having 1 to 3 carbon atoms; Y.sup.1 is a hydrogen or a fluorine; Y.sup.2 is a hydrogen or a fluorine; and Z is a nitro group or an amino group.

    Abstract translation: 本文公开了由式（I）表示的苄基醚衍生物，其可用作1,5-二苯基-1H-1,2,4-三唑-3-基的衍生物的中间体化合物， 由式（II）表示的羧酰胺，其中R是未取代或被1〜19个氟原子取代的碳原子数为1〜10的直链烷基，具有3个 未取代或被1〜19个氟原子取代的10个碳原子，碳原子数3〜10的环状烷基，碳原子数1〜3的被碳数3〜7的脂环结构取代的烷基 原子，苯基或碳原子数为7〜9的芳烷基; X1是卤素或具有1至3个碳原子的烷基; X 2是氢，卤素或具有1至3个碳原子的烷基; Y1是氢或氟; Y2是氢或氟; Z为硝基或氨基。

    Process for the preparation of 2-chloro-4-nitro-alkylbenzene
    245.
    发明授权
    Process for the preparation of 2-chloro-4-nitro-alkylbenzene 失效
    制备2-氯-4-硝基苯乙烯的方法

    公开(公告)号：US5095157A

    公开(公告)日：1992-03-10

    申请号：US518063

    申请日：1990-05-02

    Applicant: Franz-Josef Mais ,  Helmut Fiege

    Inventor： Franz-Josef Mais ,  Helmut Fiege

    IPC: B01J27/26 ,  B01J31/30 ,  C07B61/00 ,  C07C201/12 ,  C07C205/12

    CPC classification number: C07C201/12

    Abstract: In the preparation of 2-chloro-4-nitro-alkylbenzene by reaction of 4-nitro-alkylbenzene with elemental chlorine or chlorine-releasing compounds in the presence of a Friedel-Crafts catalyst in the liquid phase, particularly high selectivities in respect of the target compounds chlorinated exclusively in the 2-position are achieved if a dibenzo-condensed sulphur heterocycle of the formula ##STR1## having the meanings given in the description for R.sup.1 to R.sup.8, X and n, is used as co-catalyst.

    Abstract translation: 在液相中在Friedel-Crafts催化剂存在下，通过4-硝基 - 烷基苯与元素氯或释放氯的化合物的反应制备2-氯-4-硝基 - 烷基苯，特别是在 如果将具有R1至R8，X和n的描述中给出的含义的具有式（IMA）（II）的二苯并稠合硫杂环作为助催化剂，则可实现仅在2-位氯化的目标化合物。

    1,14-bis(4-nitrophenyl)-1,3,5,7,9,11,13-tetradecaheptaene and preparation method thereof
    247.
    发明授权
    1,14-bis(4-nitrophenyl)-1,3,5,7,9,11,13-tetradecaheptaene and preparation method thereof 失效
    1,14-双（4-硝基苯基）-1,3,5,7,9,11,13-十四碳庚烯及其制备方法

    公开(公告)号：US5072061A

    公开(公告)日：1991-12-10

    申请号：US532745

    申请日：1990-06-04

    Applicant: Masaomi Sasaki ,  Tomoyuki Shimada ,  Mitsuru Hashimoto

    Inventor： Masaomi Sasaki ,  Tomoyuki Shimada ,  Mitsuru Hashimoto

    IPC: G03G5/06 ,  C07C201/12 ,  C07C205/06

    CPC classification number: C07C201/12

    Abstract: 1,14-bis(4-nitrophenyl)-1,3,5,7,9,11,13-tetradecaheptaene having the following formula (I): ##STR1## and a method of preparing the above-mentioned 1,14-bis(4-nitrophenyl)-1,3,5,7,9,11,13-tetradecaheptaene having formula (I) by allowing a phosphonium salt having formula (II) to react with 5-(4-nitrophenyl)-2,4-pentadiene-1-al having formula (III) in the presence of a basic catalyst:R.sub.3 P.sup..sym. H.sub.2 C--CH.dbd.CH--CH.sub.2 P.sup..sym. R.sub.3.2X.sup..crclbar. (II)wherein R represents a phenyl group or an alkyl group having 1 to 6 carbon atoms; and X represents a halogen, ##STR2##

    Abstract translation: 具有下式（I）的1,14-双（4-硝基苯基）-1,3,5,7,9,11,13-十四碳庚烯：（I）和制备上述1 具有式（I）的14-双（4-硝基苯基）-1,3,5,7,9,11,13-十四碳庚烯通过使具有式（II）的鏻盐与5-（4-硝基苯基） 在碱性催化剂存在下，具有式（III）的-2,4-戊二烯-1-a1：R3P（+）H2C-CH = CH-CH2P（+）R3.2X（ - ）（Ⅱ）其中R表示 苯基或具有1至6个碳原子的烷基; （III）表示卤素，

    Aldol condensation of nitroparaffins
    248.
    发明授权
    Aldol condensation of nitroparaffins 失效
    硝基烷烃的醛醇缩合

    公开(公告)号：US5041691A

    公开(公告)日：1991-08-20

    申请号：US345517

    申请日：1989-05-01

    Applicant: Willi Wuest ,  Rainer Eskuchen ,  Herbert Esser

    Inventor： Willi Wuest ,  Rainer Eskuchen ,  Herbert Esser

    IPC: C07C67/00 ,  C07C201/00 ,  C07C201/12 ,  C07C205/12 ,  C07C205/15

    CPC classification number: C07C201/12

    Abstract: A process for reacting nitroparaffins with formaldehyde in the presence of potassium hydroxide by aldol condensation which can be carried out continuously or discontinuously and on a large scale. This is achieved by mixing the nitroparaffin, aqueous aldehyde solution and potassium hydroxide in the absence of organic solvents and carrying out the reaction while maintaining the temperature between -5.degree. and +20.degree. C.

    Abstract translation: 在氢氧化钾存在下，通过醛醇缩合使硝基烷烃与甲醛反应的方法，其可以连续地或不连续地并且大规模地进行。 这是通过在不存在有机溶剂的情况下将硝基石蜡，醛水溶液和氢氧化钾混合并在保持温度在-5℃和+ 20℃之间进行反应来实现的。

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