Visible light photoredox-catalysed intermolecular radical addition of α-halo amides to olefins

We present alpha-chloro amides as a new class of alpha-acetyl radical precursors, which undergo a tin-free, photoredox-catalysed intermolecular alpha-alkylation with various olefins exclusively in an anti-Markovnikov fashion. The reaction represents a reductive atom transfer radical addition (ATRA) and provides a series of alkylated amides in good yields.