Silica sulfuric acid is utilized as a green, highly efficient, heterogeneous and recyclable catalyst for the preparation ofβ-enaminones andβ-enamino esters from amines andβ-dicarbonyl compounds under solvent-free conditions at 80 °C. Using this method, the title compounds are produced in high to excellent yields and in short reaction times.
A Green Solventless Protocol for the Synthesis ofβ-Enaminones andβ-Enamino Esters Using Silica Sulfuric Acid as a Highly Efficient, Heterogeneous and Reusable Catalyst