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    Process for reducing dithiocarbazinate buildup in the preparation of methyl dithiocarbazinate
    3.
    发明授权
    Process for reducing dithiocarbazinate buildup in the preparation of methyl dithiocarbazinate 失效
    二硫代肼基甲酸二甲酯的制备方法

    公开(公告)号：US5861526A

    公开(公告)日：1999-01-19

    申请号：US869325

    申请日：1997-06-05

    申请人： David M. Mayes

    发明人： David M. Mayes

    IPC分类号： C07C337/02 ,  C07C333/00

    CPC分类号： C07C337/02

    摘要： Disclosed herein is an improved process for preparing methyl dithiocarbazinate by reacting carbon disulfide and hydrazine in an effective ratio to form hydrazinium dithiocarbazinate, followed by methylating the hydrazinium dithiocarbazinate with methyl bromide. The improvement resides in conducting the reaction of the carbon disulfide and hydrazine in the presence of a specified amount of a non-alcoholic solvent to reduce dithiocarbazinate buildup.

    摘要翻译： 本文公开了一种通过使二硫化碳和肼以有效比例使二硫代肼基甲酸肼反应制备二硫代肼基甲酸甲酯，然后用甲基溴甲基化二硫代肼基甲酸肼的改进方法。 改进在于在特定量的非醇溶剂的存在下进行二硫化碳和肼的反应以减少二硫代肼基甲酸盐的积累。

    Substituted 1,3,4-thiadizaolinones, processes for their preparation, and their use for combating endoparasites
    7.
    发明授权
    Substituted 1,3,4-thiadizaolinones, processes for their preparation, and their use for combating endoparasites 失效
    取代1,3,4-噻唑烷酮，其制备方法及其用于组合内生菌的用途

    公开(公告)号：US5095024A

    公开(公告)日：1992-03-10

    申请号：US581934

    申请日：1990-09-13

    申请人： Nikolaus Muller ,  Gerhard Bonse ,  Werner Lindner ,  Achim Harder

    发明人： Nikolaus Muller ,  Gerhard Bonse ,  Werner Lindner ,  Achim Harder

    IPC分类号： A01N43/824 ,  A61K31/41 ,  A61K31/433 ,  A61P33/00 ,  A61P33/10 ,  C07C243/28 ,  C07C337/02 ,  C07C337/06 ,  C07D285/12 ,  C07D285/125 ,  C07D285/13

    CPC分类号： C07D285/13 ,  C07C337/02 ,  C07D285/125

    摘要： Substituted 1,3,4-thiadiazolinones of the formula (I), ##STR1## in which X represents O or S,R.sup.1 represents hydrogen, alkyl, alkoxy, alkylthio, halogen, halogenoalkyl, halogenoalkoxy or halogenoalkylthio,R.sup.2 represents one or more identical or different radicals from the series comprising hydrogen, alkyl, alkoxy, alkylthio, halogenoalkyl, halogenoalkoxy, halogenoalkylthio, alkylenedioxy, halogenoalkylenedioxy, halogen, CN, NO.sub.2, NH.sub.2, alkylamino, dialkylamino, alkylcarbonyl, carbalkoxy, alkylsulphonyl, arylsulphonyl, sulphamoyl, alkylsulphamoyl, dialkylsulphamoyl, aryl, aryloxy and arylthio, each of which can, in turn, be substituted as well, andR.sup.3 represents alkyl, alkenyl or alkynyl, each of which can optionally be substituted,with the exception of the compound 5-methylmercapto-3-phenyl-1,3,4-thiadiazol-2-(3H)-one, are disclosed as being useful to combat endoparasites. Compositions containing these compounds, process for preparing them, and novel intermediates are also disclosed.

    摘要翻译： 取代的式（I）的1,3,4-噻二唑啉酮，其中X代表O或S，R1代表氢，烷基，烷氧基，烷硫基，卤素，卤代烷基，卤代烷氧基或卤代烷硫基，R2代表一 或更多相同或不同的基团，其包含氢，烷基，烷氧基，烷硫基，卤代烷基，卤代烷氧基，卤代烷硫基，亚烷基二氧基，卤代亚烷基二氧基，卤素，CN，NO 2，NH 2，烷基氨基，二烷基氨基，烷基羰基，烷氧基，烷基磺酰基，芳基磺酰基，氨磺酰基， 烷基氨磺酰基，二烷基氨磺酰基，芳基，芳氧基和芳硫基，其中每一个也可以被取代，并且R 3表示烷基，烯基或炔基，其中每一个可任选被取代，除了化合物5-甲基巯基 - 3-苯基-1,3,4-噻二唑-2-（3H） - 酮被公开用于对抗内寄生虫。 还公开了含有这些化合物的组合物，其制备方法和新型中间体。

    Processes for the production of methyl dithiocarbazinate
    10.
    发明授权
    Processes for the production of methyl dithiocarbazinate 有权
    生产二硫代肼基甲酸甲酯的方法

    公开(公告)号：US06545172B1

    公开(公告)日：2003-04-08

    申请号：US10124850

    申请日：2002-04-18

    申请人： Vidyanatha A. Prasad ,  Klaus Jelich ,  Dennis E. Jackman

    发明人： Vidyanatha A. Prasad ,  Klaus Jelich ,  Dennis E. Jackman

    IPC分类号： C07C33300

    CPC分类号： C07C337/02

    摘要： A process for the production of methyl dithiocarbazinate includes the steps of providing a mixture comprising hydrazine, solvent, carbon disulfide and base; adding methyl bromide to the mixture; cooling the reaction mixture; and recovering methyl dithiocarbazinate. The methyl dithiocarbazinate may be recovered by filtering the reaction mixture to yield a solid methyl dithiocarbazinate retentate and a liquid filtrate; acidifying the filterate with a mineral acid; and adding methyl isobutylketone to the acidified filterate.

    摘要翻译： 制备二硫代肼基甲酸甲酯的方法包括提供包含肼，溶剂，二硫化碳和碱的混合物的步骤; 向混合物中加入甲基溴; 冷却反应混合物; 并回收二硫代肼基甲酸甲酯。 可以通过过滤反应混合物回收二硫代肼基甲酸甲酯，得到二硫代肼基甲酸固体甲基季戊四醇酯和液体滤液; 用无机酸酸化过滤物; 并向酸化的过滤器中加入甲基异丁基酮。