Nowadays, diversity of ionic liquids (ILs) or organic molten salts (MSs) can be achieved via anion exchange and is a subjective way for designing ILs and MSs with anions that cannot be directly prepared. Over the years, much attention has been paid to the study of exchanges in the properties of ILs and MSs by the replacement of their counter ions, which is changing physical and chemical properties such as viscosity, melting point, vapor pressure of fluids and fluorescence properties [1-2]. Ionic Liquids and molten salts as efficient solvents, catalysts and reagents have been applied for nitration reaction, regioselective sulfonation, preparation of high-energy compounds and organic synthesis under milder conditions [3-4]. Herein, we applied an anion exchange method for the synthesis of nano molten salts [PySO3H]X as magnetic (with magnetic counter ion) and non-magnetic catalysts. These nano molten salts [PySO3H]X utilized as efficient and reusable catalysts for the synthesis of a wide range of Oheterocyclic compound
