“…1 Since the advent of the Meerwein arylation reaction in the 1940s, 2 a considerable number of synthetic chemists have employed the conversions of aryl radicals as ideal supplements to transition-metal-catalyzed arylation reactions, which has yielded novel, promising alternatives for the introduction of aryl and heteroaryl moieties into molecular scaffolds. Various compounds, such as aryl halides, 3 aryl diazonium salts, 4 aryl carboxylic acids, 5 aryl triflates, 6 hypervalent iodine( iii ) reagents, 7 aryl borates, 8 and aryl sulfonium salts, 9 have been successfully used as aryl radical precursors.…”