ZnS nanoparticles as an efficient and reusable heterogeneous catalyst for synthesis of 1-substituted 1H-tetrazoles under solvent-free conditions

نویسندگانحسین نعیمی,فاطمه کیانی,محسن مرادیان
شماره صفحات1
شماره مجلد16
ضریب تاثیر (IF)2.184
نوع مقالهFull Paper
تاریخ انتشار2014-09-11
رتبه نشریهعلمی - پژوهشی
نوع نشریهالکترونیکی
کشور محل چاپایران
نمایه نشریهISI ,SCOPUS ,PubMed

چکیده مقاله

An efficient and green protocol for the synthesis of 1-substituted-1H-tetrazoles through cyclization reaction of various primary amines, sodium azide, and triethyl orthoformate was described. In this method, a series of tetrazole derivatives was synthesized by using ZnS nanoparticles as an effective, recoverable, and reusable catalyst under solvent-free conditions. This strategy is a magnificent improvement for the synthesis of these heterocycles due to the non-acidic, clean, and solvent-free conditions via a solid recyclable catalyst. The catalyst was separated by simple filtration and reused seven times without significant loss of activity. The ZnS nanoparticles with high surface area and fine monodisperse particles were prepared using the simple microwave-assisted method without using any surfactant. The ZnS nanoparticle catalyst is a good candidate to replace brønsted acids and metal salts or other catalyst for the preparation of 1-substituted-1H-tetrazoles in high yields and has potential values for industrial applications.

tags: 1-Substituted-1H-tetrazoles Solvent free ZnS nanoparticles Cyclization Primary amines Recoverable catalyst