Visible-Light-Mediated Photoredox Radical Cyclization Reaction with Alkyl Boronic Acids Using Molecular Oxygen as a Sole Oxidant

Abstract Indolo[2,1-b]quinazolin-12(6H)-one derivatives are prevalent in many synthetic intermediates, pharmaceuticals, and organic materials. Herein, we developed a photoredox radical cascade cyclization reaction that uses visible light as the primary energy input to promote the reaction, leading to a series of indolo[2,1-b]quinazolin-12(6H)-one derivatives under oxygen conditions.