Formamidinesulfinic Acid-Functionalized Fe3O4@SiO2 as a Green and Magnetic Recyclable Catalyst for Synthesis of Pyrano[2, 3-d] pyrimidinone Derivatives

摘要

Formamidine sulfonic acid (FSA) stabilized on silica-coated Fe3O4 magnetic nanoparticles as an efficient and hydrogen bonding catalyst was employed for Knoevenagel condensation and synthesis of pyrano[2, 3-d]pyrimidinone derivatives by the one-pot three-component condensation reaction in water at room temperature. The catalyst can be separated from the mixture reaction which is in close agreement with green chemistry disciplines.