2024/11/26 by Khosravi, Kaveh, Azizi, Amir, Zolfigol, Mohammad Ali +2
#1 #4-Dihydropyridines #Green chemistry #Hybrid catalyst #Nanomagnetic #Polyhydroqunolines #Tetrahydrobenzopyranes
paper · doi:10.57647/j.ijc.2025.1501.04
Recently, nanocatalysts, and especially their magnetic types, have been functionalized by appropriate organic groups and have been widely used in the synthesis of various materials. In this work, functionalized Fe3O4 nanoparticles by tris(hydroxymethyl)aminomethane/cyanuric chloride/2-pyridineethanol/SO3H were synthesized and characterized by FESEM, EDX, FT-IR, VSM, and XRD analyses. Their catalytic efficiency was tested in the synthesis of polyhydroqunolines (19 entries, 12-25 minutes, 85-95%, solvent-free, room temperature), 1,4-dihydropyridines (16 entries, 25-50 minutes, 88-92%, solvent-free, 80 °C), and tetrahydrobenzopyranes (17 entries, 10-52 minutes, 90-97%, solvent-free, room temperature) derivatives under mild and environmentally friendly reaction conditions. This novel nano organic/inorganic hybrid acidic catalyst was easily separable by an external magnet. Fast reaction times and high purity of the products are the remarkable advantages of this new catalyst.