Solvent-Free Synthesis of Aryl Iodides Using Nano SiO2/HIO4 as a Reusable Acid Catalyst

An efficient and environmentally benign method for the synthesis of aryl iodides have been developed by diazotization of aromatic amines with nano2 and nanosilica periodic acid (nano-spia) as a green catalyst via grinding followed by a sandmeyer iodination by ki under solvent-free conditions at room temperature. the ensuing aryl diazonium salts supported on nano-spia were sufficiently stable to be kept at room temperature in the dry state. this method is a novel, efficient, eco-friendly route for solvent-free synthesis of aryl iodides.