1,3‐Alkyl Transposition in Allylic Alcohols Enabled by Proton‐Coupled Electron Transfer
作者:Kuo Zhao、Gesa Seidler、Robert R. Knowles
DOI:10.1002/anie.202105285
日期:2021.9.6
for the isomerization of acyclic allylic alcohols into β-functionalized ketones via 1,3-alkyl transposition. This reaction proceeds via light-driven proton-coupled electron transfer (PCET) activation of the O−H bond in the allylic alcohol substrate, followed by C−C β-scission of the resulting alkoxy radical. The transient alkyl radical and enone acceptor generated in the scission event subsequently
描述了一种通过 1,3-烷基转位将无环烯丙醇异构化为 β-官能化酮的方法。该反应通过光驱动的质子耦合电子转移 (PCET) 激活烯丙醇底物中的 O-H 键,随后产生的烷氧基自由基的 C-C β-断裂来进行。在断裂事件中产生的瞬态烷基自由基和烯酮受体随后通过自由基共轭加成重组以提供 β-官能化酮产物。多种带有烷基和酰基迁移基团的烯丙醇底物被成功地调节。来自机理研究的见解导致改进的反应方案提高了对具有挑战性的底物的反应性能。