Abstract
A radical cascade process initiated through visible-light induced thiyl radical coupling with ortho-substituted arylisocianides followed by an intramolecular cyclization and subsequent aromatization to access 2-sulfenylindoles is described. The key thiyl radicals are promptly generated via a hydrogen atom transfer event. The redox-neutral protocol features broad substrate scope, excellent functional group tolerance, and mild reaction conditions. Furthermore, the implementation of a continuous flow variant allows smooth scalability with a short residence time through process intensification.
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