A Simple, Efficient Green Protocol for the Synthesis of β‐Enaminone and Enamino Ester Derivatives by Using Onion Extract as Green Catalyst

We have developed an environmental friendly and highly efficient method for onion extract catalyzed enamination of 1,3‐dicarbonyl compounds and primary amines. This method is applicable to a wide range of aromatic/aliphatic/heterocyclic amines with active methylene compounds, and affords the β‐enaminone and enamino ester derivatives in good to excellent yields (up to 97 %) in an eco‐friendly solvent ethanol at room temperature. The use of onion extract makes the process environmentally benign.