Catalytic Asymmetric Roskamp Reaction of α-Alkyl-α-diazoesters with Aromatic Aldehydes: Highly Enantioselective Synthesis of α-Alkyl-β-keto Esters
作者:Wei Li、Jun Wang、Xiaolei Hu、Ke Shen、Wentao Wang、Yangyang Chu、Lili Lin、Xiaohua Liu、Xiaoming Feng
DOI:10.1021/ja102832f
日期:2010.6.30
The first catalytic enantioselective Roskamp reaction of alpha-alkyl-alpha-diazoesters with aromatic aldehydes was realized using a simple chiral N,N'-dioxide-scandium(III) complex. Remarkably, with 0.05 mol % catalyst, the reaction was performed well over a series of substrates, giving the desired products chemoselectively in excellent yields (up to 99%) and enantioselectivities (up to 98% ee) under
使用简单的手性 N,N'-二氧化钪 (III) 配合物实现了 α-烷基-α-重氮酯与芳香醛的第一次催化对映选择性 Roskamp 反应。值得注意的是,使用 0.05 mol% 的催化剂,该反应在一系列底物上进行得很好,在温和的条件下以优异的产率(高达 99%)和对映选择性(高达 98% ee)化学选择性地得到所需的产物。该协议为手性 α-烷基-β-酮酯和 1,3-二醇的合成提供了一种有前途的方法。