Abstract
Based on magnetite modified with 3-aminopropyltriethoxysilane (APTES) hybrid materials Pd-Fe-Co-Ni/Fe3O4@Si-NH2 and Pd-Fe-Co-Ni/Fe3O4@Si-NH2@Pd were synthesized. Due to the synergistic effect, new magnetic polymetallic composites exhibit high catalytic activity in the Sonogashira reaction in an ionic liquid medium, which makes it possible to perform catalysis efficiently in the presence of 0.5 mol% of palladium. The new catalysts are easily removed from the reaction mixture using an external magnet and can be used up to 5-6 times without any visible loss of activity.
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