Introduction: We developed a simple, fast and new method for the Fries rearrangement of aryl esters.
Materials and Methods: 4-Hydroxy pyridinium triflate functionalized silica is a very efficient, reusable and economically
available catalyst for the Fries rearrangement in solvent-free condition and under microwave irradiation.
Results and Discussion: Also, a notable selectivity was observed in the presence of 4-hydroxy pyridinium triflate
Conclusion: Selectivity, shorter reaction time, high yield, and easy work-up are advantages of this synthetic