A mechanoredox-enabled radical annulation under ball-milling conditions affords 2-substituted benzothiophenes 3 from 2-(methylthio)benzenediazonium salts 1 and alkynes 2. Mechanical energy drives single-electron transfer without photoredox or electrochemical systems, providing a practical and environmentally benign approach to heterocycle synthesis.
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J. H. Song, E. Kim, K. Do Hyun, J. Y. Hyun, H. J. Lim and S. J. Park, RSC Mechanochem., 2026, Accepted Manuscript , DOI: 10.1039/D6MR00013D
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