Direct β-Activation of Saturated Aldehydes to Formal Michael Acceptors through Oxidative NHC Catalysis
作者:Junming Mo、Liang Shen、Yonggui Robin Chi
DOI:10.1002/anie.201302152
日期:2013.8.12
mediated by N‐heterocyclic carbenes (NHCs) enables the direct β‐carbon functionalization of saturated aldehydes (see scheme). The reaction proceeds through two sequential oxidative steps to generate α,β‐unsaturated triazolium ester equivalents as formal Michael acceptors, which react with 1,3‐diketones and β‐ketone esters in an enantioselective manner.
不走弯路:由N-杂环卡宾(NHC)介导的氧化催化作用可实现饱和醛的直接β-碳官能化(请参阅方案)。该反应通过两个连续的氧化步骤进行,以生成α,β-不饱和三唑鎓酯当量形式的Michael受体,它们与1,3-二酮和β-酮酯以对映选择性的方式反应。