作者:Toni Rantanen、Ingo Schiffers、Carsten Bolm
DOI:10.1021/op6002743
日期:2007.5.1
The mechanochemical technique of ball milling has been applied to the asymmetric opening of meso-anhydrides, mediated by the cinchona alkaloid quinidine. A simple workup procedure affords the products, optically active dicarboxylic acid monoesters, in high yields, with up to 64% ee. With most substrates no column chromatography was needed. A range of various alcohols, as well as anhydrides, reacted
球磨的机械化学技术已应用于由金鸡纳生物碱奎尼丁介导的内消旋酸酐的不对称打开。一个简单的后处理程序可以以高收率提供高达64%ee的旋光二羧酸单酯产物。对于大多数底物,无需柱色谱法。各种醇和酸酐反应良好,因此证明了该方法的范围。即使是纯固体成分的混合物也会发生反应,并且不需要溶剂(后处理期间除外)。与标准溶液反应相比,几乎等摩尔量的起始原料的可能使用大大简化了产物分离。