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Application of [Fe 3 O 4 @SiO 2 @(CH 2 ) 3 Py]HSO 4 − as heterogeneous and recyclable nanocatalyst for synthesis of polyhydroquinoline derivatives
Author(s) -
Sajjadifar Sami,
Azmoudehfard Zahra
Publication year - 2019
Publication title -
applied organometallic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 71
eISSN - 1099-0739
pISSN - 0268-2605
DOI - 10.1002/aoc.5101
Subject(s) - chemistry , ethyl acetoacetate , catalysis , thermogravimetric analysis , dimedone , heterogeneous catalysis , infrared spectroscopy , nuclear chemistry , ionic liquid , fourier transform infrared spectroscopy , ammonium acetate , spectroscopy , inorganic chemistry , analytical chemistry (journal) , organic chemistry , chemical engineering , high performance liquid chromatography , physics , quantum mechanics , engineering
Four‐component condensation reaction of aromatic aldehydes, dimedone, ethyl acetoacetate and ammonium acetate in the presence of a catalytic amount of ionic liquid on silica‐coated Fe 3 O 4 nanoparticles as a heterogeneous, recyclable and very efficient catalyst provided the corresponding polyhydroquinoline derivatives in good to excellent yields in ethanol under reflux condition. The [Fe 3 O 4 @SiO 2 @(CH 2 ) 3 Py]HSO 4 − catalyst was characterized using various techniques such as scanning electron microscopy, powder X‐ray diffraction, thermogravimetric analysis, vibrating sample magnetometry and Fourier transform infrared spectroscopy. Furthermore, the recovery and reuse of the catalyst were demonstrated seven times without detectable loss in activity.