Solvent-Free Synthesis of Benzoxazin-4-ones from N-Acyl Anthranilic Acid Derivatives

We have developed an efficient methodology for the preparation of 2-aryl-4H-3, 1-benzoxazine-4-one from an opportune N-acyl anthranilic acid derivative, under solvent free conditions, recyclable and eco-friendly catalyst and shorten experimental time, and good to excellent yields.