Abstract

A novel hybrid magnetic nanocatalyst was synthesized by covalent coating of Fe3O4
magnetic nanoparticles with choline chloride–urea deep eutectic solvent using 3‐
iodopropyltrimethoxysilane as a linker. The structure of this new catalyst was fully
characterized via elemental analysis, transmission and scanning electron microscopies,
X‐ray diffraction and Fourier transform infrared spectroscopy. It was
employed in the synthesis of various 2‐amino‐4H‐pyran derivatives in water
solution via an easy and green procedure. The desired products were obtained in
high yields via a three‐component reaction between aromatic aldehyde, enolizable
carbonyl and malononitrile at room temperature. The employed nanocatalyst was
easily recovered using a magnetic field and reused four times (in subsequent runs)
with less than 8% decrease in its catalytic activity.
KEYWORDS
eutectic, green, magnetic, nanocatalyst, pyran