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156 条记录 (耗时 0.033 秒)

    Aliphatic alkanals with improved storage stability and method of improving the storage stability
    42.
    发明授权
    Aliphatic alkanals with improved storage stability and method of improving the storage stability 有权
    具有改善储存稳定性的脂肪族链烷烃和提高储存稳定性的方法

    公开(公告)号：US6150563A

    公开(公告)日：2000-11-21

    申请号：US134562

    申请日：1998-08-14

    申请人： Hans Joachim Hasselbach ,  Klaus Huthmacher ,  Katja Kelm ,  Horst Weigel

    发明人： Hans Joachim Hasselbach ,  Klaus Huthmacher ,  Katja Kelm ,  Horst Weigel

    IPC分类号： C07C45/86 ,  C07C47/02 ,  C07C319/26 ,  C07C323/22 ,  C07C47/00

    CPC分类号： C07C323/22 ,  C07C45/86

    摘要： Aliphatic alkanals with a water content of greater than 300 ppm which are stable in storage, and a method of improving the storage stability of these aliphatic alkanals, especially of substituted, sulfur-containing alkanals. The formation of oligomers, polymers and condensation products from elimination reactions and oxidation and the subsequent reactions of the products formed results in undesired impurities that are largely prevented by the addition of an organic acid that forms metal complexes and, optionally, alkanolamines or trialkanolamines.

    摘要翻译： 水分大于300ppm的脂肪族链烷烃，其储存稳定，以及提高这些脂肪族链烷烃，特别是取代的含硫链烷烃的储存稳定性的方法。 由消除反应和氧化形成的低聚物，聚合物和缩合产物以及所形成的产物的后续反应导致不期望的杂质，其通过加入形成金属络合物的有机酸和任选的烷醇胺或三链烷醇胺而大大地被防止。

    Optically active salts of a substituted thiazolidine-4-carboxylate and 3-cyano-hydroxypropyl trimethyl-ammonium, their production and uses
    45.
    发明授权
    Optically active salts of a substituted thiazolidine-4-carboxylate and 3-cyano-hydroxypropyl trimethyl-ammonium, their production and uses 失效
    取代的噻唑烷-4-羧酸酯和3-氰基 - 羟丙基三甲基氨基铵的光学活性物质，其生产和用途

    公开(公告)号：US5191085A

    公开(公告)日：1993-03-02

    申请号：US675623

    申请日：1991-03-27

    申请人： Harald Jakob ,  Klaus Huthmacher ,  Herbert Klenk

    发明人： Harald Jakob ,  Klaus Huthmacher ,  Herbert Klenk

    IPC分类号： C07B53/00 ,  C07C255/26 ,  C07D277/06

    CPC分类号： C07D277/06

    摘要： Optically active salts are disclosed of the formula (I): ##STR1## wherein Ac represents an acyl group, R.sup.1 hydrogen or methyl, R.sup.2 and R.sup.3 identical or different substitutes, preferably methyl. The salts can be obtained from the corresponding optically active carbonic acid and DL-3-cyano-2-hydroxypropyl trimethylammonium hydroxide. The diastereomeric salt pairs are easily split from one another and separated again, so that the process is suited for producing optically active 3-cyano-2-hydroxypropyl trimethylammonium salts.

    摘要翻译： 公开了式（I）的光学活性盐：其中Ac表示酰基，R 1氢或甲基，R 2和R 3相同或不同的取代基，优选甲基。 盐可以从相应的光学活性碳酸和DL-3-氰基-2-羟丙基三甲基铵氢氧化物获得。 非对映体盐对彼此容易分离并再次分离，因此该方法适用于制备光学活性3-氰基-2-羟丙基三甲基铵盐。

    Method of preparing 1,6-di(N.sup.3 -cyano-N.sup.1 -guanidino) hexane
    46.
    发明授权
    Method of preparing 1,6-di(N.sup.3 -cyano-N.sup.1 -guanidino) hexane 失效
    制备1,6-二（N 3 - 氰基-N 1胍基）己烷的方法

    公开(公告)号：US5041655A

    公开(公告)日：1991-08-20

    申请号：US241116

    申请日：1988-09-06

    申请人： Klaus Huthmacher ,  Axel Kleemann ,  Horst Bethge ,  Rolf Braun

    发明人： Klaus Huthmacher ,  Axel Kleemann ,  Horst Bethge ,  Rolf Braun

    IPC分类号： C07C67/00 ,  C07C239/00 ,  C07C277/08 ,  C07C279/28

    CPC分类号： C07C279/28

    摘要： An improved method of preparing 1,6-di(N.sup.3 -cyano-N.sup.1 -guanidino) hexane from alkali dicyanamide and a hexamethylene diammonium salt in alcoholic solution or suspension. The reaction is carried out in the presence of a limited amount of water and of a catalytic amount of a base, preferably a tertiary amine. The pH of the reaction mixture at the start of the reaction is 8 to 10. After the reaction is over, the reaction mixture is compounded with water at a temperature above 80.degree. C. and the coarse product which crystallizes out is separated from the liquid phase.Preferably, sodium dicyanamide and hexamethylene diamine dihydrochloride, preferably formed in situ from aqueous 1,6-diaminohexane and aqueous hydrochloric acid, are reacted at pH 9-9.5 in n-butanol in the presence of 0.1 to 20% by wt. water in relation to the solvent including water.1,6-di(N.sup.3 -cyano-N.sup.1 -guanidino) hexane is obtained in a high yield (85-86%) and with great purity (95-97%) and with a considerably improved space-time yield.

    摘要翻译： 一种在醇溶液或悬浮液中由碱二氰胺和六亚甲基二铵盐制备1,6-二（N 3 - 氰基-N 1胍基）己烷的改进方法。 反应在有限量的水和催化量的碱，优选叔胺的存在下进行。 反应开始时反应混合物的pH值为8〜10。反应结束后，将反应混合物在高于80℃的温度下与水混合，将结晶出来的粗产物与液体分离 相。 优选地，优选在1,6-二氨基己烷水溶液和盐酸水溶液中原位形成的二氰胺钠和六亚甲基二胺盐酸盐在pH为9-9.5的正丁醇中，在0.1-20重量％的存在下反应。 相对于包括水在内的溶剂的水。 以高产率（85-86％）和高纯度（95-97％）获得1,6-二（N 3 - 氰基-N 1胍基）己烷，并具有显着提高的时空产率。