Microwave-assisted synthesis of 1-aryl-5-(trifluoromethyl)-1H-tetrazoles

This general protocol provides a wide variety of 5-substituted-1H-tetrazoles in good yields under mild reaction conditions. An efficient, green, and convenient method for the preparation of new 5-substituted-tetrazoles via microwave-assisted 1,3-dipolar cycloaddition reaction of N-aryl-2,2,2-trifluoroacetimidoyl chlorides and sodium azide in acetonitrile without assistance of any catalyst has been reported. The FT-IR, F-19 NMR, H-1 NMR, C-13 NMR, HMBC spectra, elemental analysis, and single-crystal X-ray analysis confirm the structures of the products. (C) 2014 Elsevier B.V. All rights reserved.