Visible‐Light‐Induced Photocatalyst‐Free Oxidative Cyclization of Primary Alcohols by Selectfluor via HAT Process: Synthesis of Quinazolinones and Benzothiadiazines

Abstract A mild and convenient method for oxidative cyclization of primary alcohols with o ‐aminobenzamides and o ‐aminobenzenesulfonamides to achieve quinazolinones and benzothiadiazines by selectfluor under visible‐light irradiation was reported. Selectfluor is used as hydrogen atom transfer reagent for oxidative cyclization under visible light irradiation. This photochemical approach offers broad substrate scope of quinazolinones and benzothiadiazines under mild reaction conditions.