Fe3O4/ZnS Hollow Nanospheres:A Highly Efficient Magnetic Heterogeneous Catalyst for Synthesis of 5-Substituted 1H-Tetrazoles from Nitriles and Sodium Azide

摘要

An efficient route for the synthesis of 5-substituted 1H-tetrazole via[2+31 cycloaddition of nitriles and sodium azide is reported using Fe3O4/ZnS hollow nanospheres as a magnetic separable heterogeneous catalyst.The catalyst is very efficient,affording excellent yields and can be reused for several circles.In addition,the Fe3O4inner shell exhibits magnetism,making the catalyst easily separated by a magnet.