Preparation of N-substituted 2-pyrrolidones
    6.
    发明授权
    Preparation of N-substituted 2-pyrrolidones 失效
    N-取代的2-吡咯烷酮的制备

    公开(公告)号:US5434273A

    公开(公告)日:1995-07-18

    申请号:US191649

    申请日:1994-02-04

    CPC分类号: C07D207/267

    摘要: The preparation of N-substituted 2-pyrrolidones (I) by the reaction of maleic acid, fumaric acid, or succinic acid or functional derivatives of these acids (compounds II) with a primary amine (III) or by the reaction of amides or imides derived from II and III under hydrogenating conditions in a synthesis stage followed by isolation, by distillation, of I and other volatile components from the resulting reaction mixture, in which the residues present following distillation are subjected to further hydrogenation treatment and the compound (I) thus formed is isolated by distillation.

    摘要翻译: 通过马来酸,富马酸或琥珀酸或这些酸(化合物II)的官能衍生物与伯胺(III)的反应或通过酰胺或酰亚胺的反应制备N-取代的2-吡咯烷酮(I) 在合成阶段在氢化条件下衍生自II和III,然后通过蒸馏从所得反应混合物中分离I和其它挥发性组分,其中在蒸馏之后存在的残余物进行进一步氢化处理,化合物(I) 由此形成的蒸馏分离。

    Preparation of poloxy-alkylene glycols
    7.
    发明授权
    Preparation of poloxy-alkylene glycols 失效
    烷氧基 - 亚烷基二醇的制备

    公开(公告)号:US5416240A

    公开(公告)日:1995-05-16

    申请号:US24903

    申请日:1993-03-02

    CPC分类号: C08G65/20

    摘要: Polyoxyalkylene glycols are prepared by a process in which tetrahydrofuran is polymerized with a total of not more than 95 mol %, based on the amount of tetrahydrofuran used, of one or more comonomers from the group consisting of the cyclic ethers and acetals in the absence of water and in the presence of a monohydric alcohol or of a monocarboxylic acid with the aid of an anhydrous heteropoly acid catalyst, and the polyoxyalkylene glycol is liberated from the resulting polyoxyalkylene glycol monoethers or polyoxyalkylene glycol monoesters by cleavage of the monoether or monoester bond.

    摘要翻译: 聚氧亚烷基二醇通过以下方法制备,其中四氢呋喃基于所用四氢呋喃的总量不超过95摩尔%,在不存在共聚单体的情况下聚合来自由环醚和缩醛组成的组中的一种或多种共聚单体 水和一元醇或单羧酸存在下,借助于无水杂多酸催化剂,通过裂解单醚或单酯键,从所得聚氧亚烷基二醇单醚或聚氧亚烷基二醇单酯中释放出聚氧亚烷基二醇。