Tungstophosphoric Acid Supported on Silica-encapsulated γ-Fe2O3 Nanoparticles Catalyzed Oxidative Amidation

We have used tungestophosphoric acid to catalyze oxidative amidation reaction from benzyl alcohols and methylarens with hydrochloride salts of amines. To achieve this purpose, modified magnetic nanoparticles (γ-Fe2O3@SiO2@H3PW12O40) were applied as catalyst and TBHP as external oxidant. After optimizing, different derivates of benzamides were synthesized in good yields. Also, the result of two oxidative amidation reactions was compared.