Highly efficient, mild and chemo- and stereoselective synthesis of enaminones and enamino esters using silica supported perchloric acid under solvent-free conditions

Silica supported perchloric acid (HClO4·SiO2) has been utilized as a heterogeneous recyclable catalyst for a highly efficient and chemo- and stereoselective conversion of β-dicarbonyl compounds by treatment with amines at room temperature into β-enaminones and β-enamino esters under solvent-free conditions.

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