Diastereo‐ and Enantioselective Inverse‐Electron‐Demand Diels–Alder Cycloaddition between 2‐Pyrones and Acyclic Enol Ethers
作者:Guanghao Huang、Régis Guillot、Cyrille Kouklovsky、Boris Maryasin、Aurélien de la Torre
DOI:10.1002/anie.202208185
日期:2022.10.17
The inverse-electron-demand Diels–Alder cycloaddition between 2-pyrones and acyclic enol ethers was investigated. Bridged bicyclic lactones were obtained diastereo- and enantioselectively and converted into synthetically relevant polysubstituted enantioenriched cyclohexene and cyclohexadiene derivatives. Mechanistic evidence as well as DFT calculations point towards a stepwise mechanism.
研究了 2-吡喃酮和无环烯醇醚之间的反电子需求狄尔斯-阿尔德环加成反应。以非对映选择性和对映选择性获得桥联双环内酯,并将其转化为合成相关的多取代对映富集环己烯和环己二烯衍生物。机制证据以及 DFT 计算都指向逐步机制。