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    Process for the preparation of α-substituted carboxylic acids from the series comprising α-hydroxycarboxylic acids and n-substituted-α-aminocarboxylic acids
    1.
    发明授权
    Process for the preparation of α-substituted carboxylic acids from the series comprising α-hydroxycarboxylic acids and n-substituted-α-aminocarboxylic acids 有权
    从包含α-羟基羧酸和n-取代的α-氨基羧酸的系列制备α-取代的羧酸的方法

    公开(公告)号：US07332067B2

    公开(公告)日：2008-02-19

    申请号：US10559766

    申请日：2004-06-03

    申请人： Christian Reufer ,  Martin Hateley ,  Thomas Lehmann ,  Christoph Weckbecker ,  Rainer Sanzenbacher ,  Jürgen Bilz

    发明人： Christian Reufer ,  Martin Hateley ,  Thomas Lehmann ,  Christoph Weckbecker ,  Rainer Sanzenbacher ,  Jürgen Bilz

    IPC分类号： C25B3/00

    CPC分类号： C25B3/04

    摘要： A process for the preparation of α-substituted carboxylic acids from the series including α-hydroxycarboxylic acids and N-substituted-α-aminocarboxylic acids by cathodic carboxylation with carbon dioxide of a compound corresponding to the general formula R1—C(═X)R2 which is constituted by aldehydes, ketones or N-substituted imines. In the past, that carboxylation has taken place in an undivided electrolytic cell with the use of a sacrificial anode. As described herein, the carboxylation takes place in the absence of a sacrificial anode in an electrolytic cell divided by a separator, at a diamond film cathode. The anode is formed of a material which is stable under electrolytic conditions; in particular, it is a diamond film electrode. The catholyte includes an organic solvent and a conducting salt.

    摘要翻译： 通过阴离子羧化与通式R 1对应的化合物的二氧化碳从包括α-羟基羧酸和N-取代的α-氨基羧酸的系列制备α-取代的羧酸的方法 > - （-X）R 2，其由醛，酮或N-取代的亚胺构成。 在过去，使用牺牲阳极在不分开的电解槽中发生羧化。 如本文所述，在金刚石膜阴极处，在电解槽中除去隔离层的牺牲阳极不存在下进行羧化。 阳极由在电解条件下稳定的材料形成; 特别是金刚石膜电极。 阴极电解液包括有机溶剂和导电盐。