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Abstract
A transition-metal-free radical 1,2-amidoalkynylation of unactivated alkenes is presented. α-Amido-oxy acids were used as amidyl radical precursors, which were oxidized by an organic photoredox catalyst (4CzlPN). The electrophilic N-radicals chemoselectively reacted with various aliphatic alkenes and the adduct radicals were then trapped by ethynylbenziodoxolone (EBX) reagents to eventually provide the amidoalkynylation products. These transformations, which were conducted under practical and mild conditions, showed high functional group tolerance and broad substrate scope. Mechanistic studies supported the radical nature of these cascades.
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