Selective catalytic Knoevenagel condensation by Ni–SiO2 supported heterogeneous catalysts: An environmentally benign approach

Selective catalytic Knoevenagel condensation is achieved with catalytic amounts of Ni impregnated on SiO2 or TiO2 supports. In this liquid phase reaction, quantitative yields were obtained under mild reaction conditions. Ni–SiO2, Ni–TiO2 catalysts showed efficiency of 100% conversion and 100% selectivity. With smaller quantities of 10% Ni–SiO2 took less duration for the completion of reaction than TiO2 catalysts in this environmentally benign process.