Catalyst-Free Intramolecular Oxidative Cyclization of <i>N</i>‑Allylbenzamides: A New Route to 2,5-Substituted Oxazoles

A catalyst-free intramolecular oxidative cyclization reaction of <i>N</i>-allylbenzamides has been developed to prepare 2,5-disubstituted oxazoles with good yields. This reaction gives an efficient synthetic strategy to form an oxazole nucleus directly from easily accessible substrates under temperate conditions