Catalytic Asymmetric Conjugate Addition of Simple Alkyl Thiols to α,β-Unsaturated <i>N</i>-Acylated Oxazolidin-2-ones with Bifunctional Catalysts
作者:Yan Liu、Bingfeng Sun、Baomin Wang、Matthew Wakem、Li Deng
DOI:10.1021/ja8085092
日期:2009.1.21
In this communication, we describe an unprecedented highly enantioselective catalytic conjugate addition of simple alkyl thiols to alpha,beta-unsaturated N-acylated oxazolidin-2-ones catalyzed by acid-base bifunctional catalysis. This reaction provides a useful catalytic method for the synthesis of optically active chiral sulfur compounds that are otherwise difficult to prepare by asymmetric catalysis
在这篇通讯中,我们描述了一种前所未有的高度对映选择性催化共轭加成,在酸碱双功能催化的催化下,简单的烷基硫醇与 α,β-不饱和 N-酰化 oxazolidin-2-ones 进行了加成。该反应为合成光学活性手性硫化合物提供了一种有用的催化方法,否则这些化合物很难通过不对称催化制备。该反应的成功发展源于一项发现,即在适当修饰后,在 6' 位带有硫脲官能团的金鸡纳生物碱可以为不对称共轭加成提供高效催化。