Visible-Light-Catalyzed Tandem Radical Addition/1,5-Hydrogen Atom Transfer/Cyclization of 2-Alkynylarylethers with Sulfonyl Chlorides
Long Li, Jiao‐Zhe Li, Yong-Bin Sun, Chun‐Mei Luo, Hui Qiu, Keqi Tang, Hongxin Liu, Wen‐Ting Wei
Abstract
A novel visible-light-catalyzed tandem radical addition/1,5-hydrogen atom transfer/cyclization cascade of 2-alkynylarylethers with sulfonyl chlorides in 2-methyltetrahydrofuran was developed under photocatalyst- and additive-free conditions. This reaction relies on unique energy transfer and solvent-radical relay strategies to generate sulfonyl radicals for the preparation of a series of sulfonyl-functionalized dihydrobenzofurans in moderate to high yields catalyzed by visible light or solar radiation.
Topics & Concepts
SulfonylChemistryCatalysisPhotochemistryTandemRadicalHydrogen atomPhotocatalysisPhotoredox catalysisAtom-transfer radical-polymerizationVisible spectrumRadical cyclizationSolventCascade reactionCombinatorial chemistryMedicinal chemistryOrganic chemistryMaterials scienceAlkylCopolymerComposite materialPolymerPhysicsOptoelectronicsSulfur-Based Synthesis TechniquesRadical Photochemical ReactionsCatalytic C–H Functionalization Methods