Abstract
An efficient and straightforward procedure has been developed for the synthesis of 2-amino-3-cyano-4H-pyrans via the one-pot three-component reaction of benzaldehydes, malononitrile and 1,3-dicarbonyl compounds using a new nanomagnetite-supported organocatalyst (MNP@PEG-ImOH) in aqueous media. The MNPs are fully characterized by various techniques including Fourier transform infrared spectroscopy (FT-IR), field-emission scanning electron microscopy (FESEM), energy-dispersive X-ray (EDAX), transmission electron microscopy (TEM), thermogravimetric analysis (TGA), X-ray diffraction (XRD), and vibrating sample magnetometry (VSM). The catalyst could readily be separated from the reaction mixture using an external magnet and could be reused in subsequent runs without a notable decrease of activity.
Acknowledgment
We are grateful to the Research Council of Payame Noor University for its financial support.
Disclosure statement
No potential conflict of interest was reported by the authors.