An expeditious and environmentally benign preparation of aryl halides from aryl amines by solvent-free grinding

An efficient solvent-free methodology for conversion of various aryl amines into bromides and chlorides via arenediazonium tosylate salts under grinding conditions is disclosed. This new methodology not only avoids the use of strong acids and expensive reagents for diazotization-halogenation reactions, but also decreases the amount of organic waste from the reaction process. (C) 2010 Elsevier Ltd. All rights reserved.