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Aromatic substitution: The treatment of diaryliodonium bromides 1 with aromatic nucleophiles 2, afforded a variety of heteroaryl‐containing biaryls 3 in good yields. The ipso‐substitution process at the heteroaryl ring in 1 occurs through the formation of aromatic cation radicals, which are initiated by the single‐electron‐transfer (SET) oxidation of 2. (HFIP= hexafluoroisopropanol)
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