<i>Ortho‐</i> Functionalized Diaryliodonium Salts: Synthesis and Reactivity

Hypervalent iodine reagents have attracted considerable attention in modern organic synthesis due to their low toxicity and versatile reactivity. Among them, ortho ‐functionalized diaryliodonium salts represent an important subclass, distinguished by their unique structural characteristics and reactivity. This review summarizes recent advances in the development of ortho ‐functionalized diaryliodonium reagents, with particular emphasis on the role of ortho ‐substituents as leaving groups or participanting moieties in reactions. Newly developed transformations are discussed alongside their mechanisms, highlighting the intramolecular interactions with the iodine(III) center.