Functionalized Diaryliodonium Salts with <i>N</i> ‐Reactive Amides: Versatile Reactivity for Constructing Benzo‐Fused Nitrogen Heterocycles

Diaryliodonium(III) salts with N ‐reactive amides are proposed as new attractive synthetic tools for the construction of benzo‐fused nitrogen heterocycles. In this study, we have developed an efficient preparation method for ortho ‐functionalized diaryliodonium salts bearing N ‐phthalimide ( N ‐NPhth) groups. Unlike strategies requiring ortho ‐leaving groups, these salts demonstrated their application in both transition metal‐free and transition metal‐catalyzed sequential coupling reactions, leading to the construction of five‐ and seven‐membered heterocyclic compounds.