Polyvinyl amine coated Fe3O4@SiO2 magnetic microspheres for Knoevenagel condensation

Polyvinyl amine coated Fe3O4@SiO2 composite microspheres with a core-shell structure were prepared and employed as a magnetic catalyst for Knoevenagel condensation under mild conditions. The catalyst can be readily recovered using a magnet and reused several times without loss in activity or selectivity. The performance of the magnetic base catalyst was compared with that of polyvinyl amine functionalized mesoporous SBA-15, which showed that the magnetic nanoparticles gave improved reaction rate and yield.

Graphical AbstractPolyvinyl amine coated Fe3O4@SiO2 was prepared by a simple method. This new magnetic catalyst exhibited high catalytic activity in Knoevenagel condensation of various aromatic and aliphatic aldehydes under mild conditions along with excellent level of reusability.Figure optionsDownload as PowerPoint slide