Silica-Supported Perchloric Acid (HClO<sub>4</sub>-SiO<sub>2</sub>): An Efficient Catalyst for the Preparation of<font>β</font>-Amido Carbonyl Compounds Using Multicomponent Reactions
Abstract A new, one-pot, efficient, three-component condensation of benzaldehyde derivatives, enolizable ketones, acetyl chloride, and acetonitrile or benzonitrile in the presence of silica-supportedperchloricacid as an effective catalyst for the synthesis of β-amido carbonyl compounds is described. The present methodology offers several advantages, such as good yields, short reaction times, and