Ionic liquids (ILs), a novel class of versatile solvents, have emerged as promising homogeneous catalysis media or catalysis, because of their unique physiochemical properties, including negligible vapor pressure, wide liquid range, higher ionic conductivity, and excellent solubility. ……. We have successfully developed a simple, facile and efficient method for the synthesis of tetrahydrobenzo[b]pyrans using a catalytic amount of 2-(2-hydroxyethoxy) ammonium formate as an inexpensive IL. …..
