Method for preparing p-hydroxymandelic compounds optionally substituted
    1.
    发明授权
    Method for preparing p-hydroxymandelic compounds optionally substituted 失效
    制备任选取代的对羟基扁桃酸化合物的方法

    公开(公告)号:US06753441B1

    公开(公告)日:2004-06-22

    申请号:US09719839

    申请日:2001-03-14

    IPC分类号: C07C6976

    摘要: The invention concerns a method for preparing p-hydroxymandelic compounds optionally substituted and their derivatives. More particularly, it concerns a method for preparing p-hydroxymandelic acid and methoxy-3 p-hydroxymandelic acid and their derivatives. The invention concerns a method for preparing p-hydroxymandelic compounds optionally substituted and their derivatives, which consists in condensing in water, in the presence of an alkaline agent, an aromatic compound bearing at least a hydroxyl group and whereof the position in para is free, with glyoxylic acid, said method being characterised in that the reaction is carried out in the presence of an efficient amount of a compound bearing at least two carboxylic functions.

    摘要翻译: 本发明涉及一种制备任选取代的对羟基扁桃酸化合物及其衍生物的方法。 更具体地说,它涉及一种制备对羟基扁桃酸和甲氧基-3对羟基扁桃酸及其衍生物的方法。 本发明涉及一种制备任选取代的对羟基扁桃酸化合物及其衍生物的方法,该方法包括在水中,在碱性试剂存在下,至少含羟基的芳族化合物和其中的位置在其中位于其中, 所述方法的特征在于反应在有效量的具有至少两个羧酸官能团的化合物的存在下进行。