Iodine/Hydrogen Peroxide Promoted Intramolecular Oxidative C–O Bond Formation in Ethanol at Room Temperature: A Green Approach to 1,3-Oxazines

An I 2 /H 2 O 2 -promoted intramolecular C–O bond-formation reaction of a variety of 1-(aminoalkyl)-2-naphthols or 2-(aminoalkyl)phenols to give the corresponding 1,3-oxazines was developed. The reaction is simple, atom-economic, and proceeds smoothly at room temperature under metal-free conditions in ethanol as solvent.