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For a long time the unusually poor reactivity of cyclic diaryliodonium ions toward nucleophiles remained a mystery. Only very recently has a solution to this puzzle been found, shedding light on the mechanism of aromatic nucleophilic substitution reactions of iodonium salts. This article provides an overview of the most important current advances in the field, both theoretical and practical.
Vladimir V. Grushin (Sat,) studied this question.