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Thiourea dioxide‐grafted γ‐Fe 2 O 3 /HAp magnetic nanoparticles: Efficient, green and reusable nanocatalyst for synthesis of pyranopyridine derivatives
Author(s) -
Azarifar Davood,
Ghaemi Masoumeh
Publication year - 2017
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.3834
Subject(s) - malononitrile , chemistry , thiourea , catalysis , nanoparticle , nuclear chemistry , magnetic nanoparticles , solvent , green chemistry , organic chemistry , chemical engineering , reaction mechanism , engineering
A novel t hiourea dioxide‐functionalized hydroxyapatite‐encapsulated hybrid core‐shell γ‐Fe 2 O 3 @HAp‐TUD nanoparticles (MNPs) were prepared and characterized by FT‐IR, EDX, SEM, XRD, TGA and VSM analytical methods. The catalytic activity of these MNPs was evaluated through one‐pot three‐component reactions between various substituted aldehydes, malononitrile and 3‐cyano‐6‐hydroxy‐4‐methyl‐pyridin‐2(1 H )‐one to afford the corresponding pyrano[2,3‐b]pyridines in high yields under mild and solvent‐free conditions. The catalyst can be easily recycled in a magnetic field and reused in five consecutive runs without significant decrease of its catalytic activity.