Acidic Ionic Liquid Bridge Supported on Nano Rice Husk Ash: An Efficient Promoter for the Conversion of Nitriles to Their Corresponding 5‐Substituted 1H‐Tetrazoles and Amides

Abstract

AbstractIn this study, an efficient method is reported for the preparation of 5‐substituted 1H‐tetrazoles and amides using nano rice husk ash modified with an ionic liquid bridge [RHA‐[bip]‐NH2+ HSO4−] as a new heterogeneous catalyst. This reagent was obtained easily and simply from the preparation and consolidation of bis‐3‐(trimethoxysilylpropyl)‐ammonium hydrogen sulfate on nano rice husk ash and identified with different methods including FT‐IR, XRD, FESEM, TEM and TGA. All products using this catalyst were obtained in suitable times with excellent isolated yields without the formation of any by‐products. Heterogeneous nature of the reaction conditions, ease of the preparation of the catalyst and its stability and reusability are the other important features of this method.