Transition-Metal-Free Tunable Regioselective [3+2] Cycloaddition of Diaryliodonium salts with 1, 3-Dicarbonyl Derivatives

A new [3+2] cycloaddition reaction of diaryliodonium salts with 1,3-dicarbonyl compounds for the synthesis of benzofuran derivatives is reported, involving the sequential selective coupling of dual electrophilic and nucleophilic reagents....