Nanocrystalline TiO2-HClO4: A novel, efficient and recyclable catalyst for the chemoselective N-Boc protection of amines under solvent-flee conditions

摘要

Nanocrystalline TiO2-HClO4,as newly reported catalyst,has been used as an efficient and reusable catalyst for the chemoselective N-Boc protection of amines.The clean,mild acidity condition,quantitative yields of products,short reaction time and low reaction temperature are attractive features of this reaction.In practice,this method is a combination of a satisfactory synthesis and more significantly easy product isolation and purification.