... Solvent-free L-proline catalysed condensation of ethyl cyanoacetate with aldehydes. Hossein. A. Oskooie, Elham Roomizadeh and Majid. M. Heravi*. Department of Chemistry, School of Sciences, Azzahra University, Vanak, Tehran, Iran. Solvent-free Knoevenagel condensation of ethyl cyanoacetate with aromatic aldehydes, catalysed by environmentally friendly silica gel supported L-proline under microwave irradiation is studied. ...