Process of preparing N-substituted aldonamides having improved color and
color stability
    47.
    发明授权
    Process of preparing N-substituted aldonamides having improved color and color stability 失效
    制备具有改善的颜色和颜色稳定性的N-取代的异黄酮类化合物的方法

    公开(公告)号:US5401839A

    公开(公告)日:1995-03-28

    申请号:US35853

    申请日:1993-03-23

    摘要: A process of preparing N-substituted aldonamides, the process including the steps of mixing and reacting an aldonolactone and an amine in an organic polar solvent, in the presence of an antioxidant and a reducing agent. The aldonamides have improved color; the discoloration or browning of the aldonamides upon storage or elevated temperature processing is eliminated or substantially minimized.

    摘要翻译: 一种制备N-取代的异黄酮酰胺的方法,该方法包括在有机极性溶剂中,在抗氧化剂和还原剂存在下混合和反应醛固体内酯和胺。 aldonamides具有改善的颜色; 在储存或高温处理时,异黄酮类物质的变色或褐变被消除或基本上最小化。

    Process of preparing N-substituted aldonamides
    48.
    发明授权
    Process of preparing N-substituted aldonamides 失效
    制备N-取代的异黄酮类药物的方法

    公开(公告)号:US5386018A

    公开(公告)日:1995-01-31

    申请号:US147699

    申请日:1993-11-04

    IPC分类号: C07C235/06 C07H15/04 C07G3/00

    CPC分类号: C07H15/04 C07C235/06

    摘要: N-substituted aldonamides are synthesized by the reaction of alkylamines and aldonolactone. Commercially available sources of aldonolactones (e.g., lactobiono-1,5-lactone) include aldonic acid (e.g., lactobionic acid). The presence of the acid leads to the formation of an ammonium salt impurity. The ammonium salt formation during the synthesis of N-alkyl aldonamides was minimized by the addition of an external acid. External acids and, optionally, emulsifiers were utilized to substantially reduce or eliminate the formation of an ammonium salt and to obtain N-substituted aldonamides of high purity.

    摘要翻译: N-取代的异丁酰胺通过烷基胺和醛酮内酯的反应合成。 醛糖内酯(例如,乳糖-1,5-内酯)的商业来源包括醛糖酸(例如乳糖酸)。 酸的存在导致形成铵盐杂质。 通过加入外部酸,使N-烷基异黄酮合成期间的铵盐形成最小化。 使用外部酸和任选的乳化剂来显着降低或消除铵盐的形成并获得高纯度的N-取代的异黄酮酰胺。