Catalyst‐free synthesis of quinazolinones by oxidative cyclization under visible light in the absence of additives

Abstract A general metal‐free oxidative cyclization route was developed to synthesize quinazolinones under visible light. A series of substituted 2‐aminobenzamides were reacted with aldehydes or ketones to produce the desired quinazolinones in good yields. Most importantly, the reaction did not require excess oxidant or high temperatures.