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Polyethylene Glycol‐( N ‐Methylimidazolium) Hydroxide‐Grafted γ‐Fe 2 O 3 @HAp: A Novel Nanomagnetic Recyclable Basic Phase‐Transfer Catalyst for the Synthesis of Tetrahydrobenzopyran Derivatives in Aqueous Media
Author(s) -
Talaei Hamed,
FallahMehrjardi Mehdi,
Hakimi Fatemeh
Publication year - 2018
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.201700401
Subject(s) - chemistry , polyethylene glycol , malononitrile , dimedone , hydroxide , catalysis , nanocomposite , nuclear chemistry , polymer chemistry , fourier transform infrared spectroscopy , phase transfer catalyst , peg ratio , nanoparticle , chemical engineering , organic chemistry , finance , engineering , economics
Polyethylene glycol‐( N ‐methylimidazolium) hydroxide‐grafted hydroxyapatite encapsulated γ‐Fe 2 O 3 nanoparticles, γ‐Fe 2 O 3 @HAp@PEG(mim)OH, were prepared and characterized by FTIR, SEM, TEM, TGA, and EDAX. This nanocomposite was applied as a novel, green, nanomagnetic, and recyclable basic phase‐transfer catalyst for the synthesis of tetrahydrobenzopyrans in high yields via the three‐component reaction of aromatic aldehydes, malononitrile, and dimedone or 1,3‐cyclohexanedione in aqueous media at ambient temperature.