Recent Progress in Aryl Radical-Mediated Cyclization of Unsaturated Bonds Based on Aryldiazonium Salts

Aryldiazonium salts are widely used in organic synthesis due to their high reactivity and readily availability.As a common arylation reagent, aryl diazonium salts have been widely used in material chemistry, dye chemistry and medicinal chemistry by retaining and leaving N2 skeleton.In recent years, with the rapid development of radical chemistry, the cyclization reaction involving aryl radicals, which produced by aryldiazonium salts, has also been developed rapidly, and this strategy also stimulates the enthusiasm of organic chemists to construct various ring compounds.In this review, the addition of unsaturated carbon-carbon bonds and carbon-nitrogen bonds to construct various cyclic compounds from aryl radicals is summarized and classified according to the size of the cyclic compounds.Finally, the current research progress is summarized.