Synthesis of 2-amino-4,6-diarylnicotinonitrile in the presence of CoFe2O4@SiO2-SO3H as a reusable solid acid nanocatalyst under microwave irradiation in solvent-freeconditions

The modification of silica-coated CoFe2O4 magnetic nanoparticles (CoFe2O4@SiO2) with chlorosulfonic acid, which can be utilized as an organic-inorganic hybrid heterogeneous catalyst, introduces an astonishing and efficient system for the synthesis and simplicity of the recovery of the catalyst. The applied CoFe2O4 magnetic nanoparticles are 22.98–45.30 nm measured that can be utilized as a catalyst for the preparation of...