<i>N</i>
‐Heterocyclic Carbene‐Catalyzed Enantioselective Intramolecular Annulations to Construct Benzo‐Fused Pyranones with Quaternary Stereocenter
作者:Krzysztof Dzieszkowski、Zbigniew Rafiński
DOI:10.1002/adsc.202000550
日期:2020.9.21
intramolecular NHC‐catalyzed approach for the synthesis of benzo‐fused pyranones bearing quaternary stereocenter is described. The developed methodology is based on annulation reaction between acyl anion intermediates and β,β‐disubstituted Michael acceptors. The reaction offers streamlined and effective access to target products in a highly stereoselective manner.
描述了一种高度对映选择性的分子内NHC催化方法,用于合成带有四级立体中心的苯并稠合吡喃酮。所开发的方法基于酰基阴离子中间体与β,β-二取代的Michael受体之间的环合反应。该反应以高度立体选择性的方式提供了对目标产物的简化有效访问。