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Sulfamic‐Acid‐Functionalized Fe 3‐x Ti x O 4 Nanoparticles as Novel Magnetic Catalyst for the Synthesis of Hexahydroquinolines under Solvent‐Free Condition
Author(s) -
Azarifar Davood,
Asadpoor Roshanak,
Badalkhani Omolbanin,
Jaymand Mehdi,
Tavakoli Elham,
Bazouleh Mona
Publication year - 2018
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201802505
Subject(s) - sulfamic acid , thermogravimetric analysis , catalysis , materials science , nuclear chemistry , nanoparticle , dynamic light scattering , fourier transform infrared spectroscopy , magnetic nanoparticles , infrared spectroscopy , transmission electron microscopy , scanning electron microscope , dimedone , inorganic chemistry , chemical engineering , chemistry , organic chemistry , nanotechnology , engineering , composite material
Sulfamic acid‐functionalized Fe 3‐x Ti x O 4 nanoparticles (Fe 3‐x Ti x O 4 ‐SO 3 H NPs) were fabricated as novel acidic magnetic nanocatalyst by the reaction of Fe 3‐x Ti x O 4 magnetic nanoparticles (MNPs) with 3‐chloropropyltrimethoxysilyl urea (TMSPU) followed by functionalization with chlorosulfonic acid. The structure of the synthesized nanocatalyst was studied using different methods including, Fourier‐transform infrared (FT‐IR), field‐emission scanning electron microscopy (FE‐SEM), transmission electron microscopy (TEM), powder X‐ray diffraction (XRD), energy‐dispersive X‐ray spectroscopy (EDX), thermogravimetric analysis (TGA), vibrating sample magnetometer (VSM), and dynamic light scattering (DLS). The potential catalytic ability of the synthesized MNPs was studied in one‐pot four‐component condensation reaction between aromatic aldehydes, dimedone, alkyl acetoacetates and ammonium acetate in order to synthesis of hexahydroquinoline derivatives. It was witnessed that the reactions proceeded smoothly under solvent‐free condition with high yields of corresponding hexahydroquinolines.