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The first urea‐based ionic liquid‐stabilized magnetic nanoparticles: an efficient catalyst for the synthesis of bis(indolyl)methanes and pyrano[2,3‐ d ]pyrimidinone derivatives
Author(s) -
Zolfigol Mohammad Ali,
AyaziNasrabadi Roya,
Baghery Saeed
Publication year - 2016
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.3428
Subject(s) - malononitrile , chemistry , ionic liquid , catalysis , urea , thermogravimetric analysis , green chemistry , magnetic nanoparticles , nanoparticle , one pot synthesis , condensation reaction , inorganic chemistry , ionic bonding , solvent , nuclear chemistry , organic chemistry , chemical engineering , ion , engineering
Urea‐based ionic liquid stabilized on silica‐coated Fe 3 O 4 magnetic nanoparticles, {Fe 3 O 4 @SiO 2 @(CH 2 ) 3 ‐Urea‐SO 3 H/HCl}, as an unexceptionable and smooth releasing urea fertilizer in alkali soils was synthesized and fully characterized using Fourier transform infrared, UV–visible and energy‐dispersive X‐ray spectroscopies, X‐ray diffraction, scanning and transmission electron microscopies, atomic force microscopy and thermogravimetric analysis. The nanostructure catalyst as a novel, green and efficient catalyst was applied for the synthesis of bis(indolyl)methane derivatives via the condensation reaction between 2‐methylindole and aldehydes at room temperature under solvent‐free conditions. Also, pyrano[2,3‐ d ]pyrimidinone derivatives were prepared in the presence of the nanomagnetic urea‐based catalyst by the one‐pot three‐component condensation reaction of 1,3‐dimethylbarbituric acid, aldehydes and malononitrile under solvent‐free conditions at 60 °C. To the best of our knowledge, this is the first report of the synthesis of urea‐based ionic liquid stabilized on silica‐coated Fe 3 O 4 magnetic nanoparticles. So the present work can open up a new and promising insight in the course of rational design, synthesis and applications of task‐specific fertilizer‐based nanomagnetic ionic liquids with desirable properties as unexceptionable substances for sustainable processes. Copyright © 2016 John Wiley & Sons, Ltd.