Manganese-Catalyzed Redox-Neutral C−H Olefination of Ketones with Unactivated Alkenes
作者:Yuanyuan Hu、Bingwei Zhou、Hui Chen、Congyang Wang
DOI:10.1002/anie.201806287
日期:2018.9.10
presence of either palladium salts or trimethylamine N‐oxide (Me3N+O−) have been reported, but the catalytic versions remain untouched so far. Herein, the first manganese‐catalyzed redox‐neutral C−H olefination of ketones with unactivated alkenes is described, and shows a distinct reactivity with its parent stoichimetric reactions. Remarkably, mechanistic experiments and DFTcalculations uncovers a unique
Irradiation of terminal aromatic gamma,delta-epoxy ketones with a 450 W UV lamp led to Norrish type II cyclization/semi-pinacol rearrangement cascade reaction which formed the benzocyclobutanones containing a full-carbon quaternary center, whereas irradiation of substituted aromatic gamma,delta-epoxy ketones led to the indanones through a photochemical epoxy rearrangement and 1,5-biradicals cyclization