Practical and Efficient Synthesis of Hydroxyaryl Ketones Catalyzed by HF@SiO2 under Solvent-free Condition

Selective hydrodeoxygenation of hydroxyacetophenones to ethyl-substituted phenol derivatives using a FeRu@SILP catalyst

The selective hydrodeoxygenation of hydroxyacetophenone derivatives is achieved opening a versatile pathway for the production of valuable substituted ethylphenols from readily available substrates. Bimetallic iron ruthenium nanoparticles immobilized on an imidazolium-based supported ionic liquid phase (Fe25Ru75@SILP) show high activity and stability for a broad range of substrates without acidic co-catalysts.

4-Hydroxy Pyridinium Triflate@SiO2 Nanoparticles as a Novel Efficient Catalyst for Fries Rearrangement of Aryl Esters with High Selectivity

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 functionalized silica.

CONCLUSION

Selectivity, shorter reaction time, high yield, and easy work-up are advantages of this synthetic method.