The Cinchona Primary Amine-Catalyzed Asymmetric Epoxidation and Hydroperoxidation of α,β-Unsaturated Carbonyl Compounds with Hydrogen Peroxide
作者:Olga Lifchits、Manuel Mahlau、Corinna M. Reisinger、Anna Lee、Christophe Farès、Iakov Polyak、Gopinadhanpillai Gopakumar、Walter Thiel、Benjamin List
DOI:10.1021/ja402058v
日期:2013.5.1
Using cinchona alkaloid-derived primary amines as catalysts and aqueous hydrogen peroxide as the oxidant, we have developed highly enantioselective Weitz-Scheffer-type epoxidation and hydroperoxidation reactions of α,β-unsaturated carbonyl compounds (up to 99.5:0.5 er). In this article, we present our full studies on this family of reactions, employing acyclic enones, 5-15-membered cyclic enones, and
以金鸡纳生物碱衍生的伯胺为催化剂,过氧化氢水溶液为氧化剂,我们开发了α,β-不饱和羰基化合物(高达99.5:0.5 er)的高对映选择性Weitz-Scheffer型环氧化和氢过氧化反应。在本文中,我们展示了我们对这一系列反应的完整研究,使用无环烯酮、5-15 元环状烯酮和 α-支链烯酮作为底物。除了扩大范围外,还介绍了产品的合成应用。我们还报告了催化中间体的详细机理研究、金鸡纳胺催化剂的构效关系以及通过 NMR 光谱研究和 DFT 计算得出的绝对立体选择性的合理化。