Knoevenagel condensation at room temperature using SeO2/ZrO2 catalyst in water-medium and solvent-free conditions

Vijaya Banothu, Manohar Basude

Abstract

A simple protocol is described for the synthesis of alkenes derivatives in excellent yields by Knoevenagel condensation of aromatic aldehyde with active methylene compounds in water, acetonitrile and solvent free condition using selenium promoted ZrO2 solid catalyst at room temperature. The performance of the catalyst was effective in presence of water. Zirconia and selenium promoted ZrO2 solid catalyst exhibited the same crystallite size of 28 nm and tetragonal phase but different activity. The catalyst can be easily recovered by filtration, higher yield of product and can be recycled efficiently.