Green, Natural and Low Cost Xanthum Gum Supported Fe₃O₄ as a Robust Biopolymer Nanocatalyst for the One-Pot Synthesis of 2-Amino-3-Cyano-4H-Pyran Derivatives

Abstract

Today, due to expanding the demand for inexpensive catalysts, recyclable magnetic nanocatalysts immobilized on polysaccharides have found more superiorities versus classical heterogeneous catalysts. Xanthan gum is a polysaccharide that contains acidic features and low-cost prices has various applications. Herein, it was demonstrated that xanthan gum can attract more attentions in catalysis science and technology. Therefore, magnetically recoverable Fe₃O₄@xanthan gum biopolymer nanocatalyst was prepared by in-situ method and used for the synthesis of 2-amino-3-cyano-4H-pyran derivatives via a multicomponent reaction at room temperature in ethanol. The characterization of Fe₃O₄@xanthan gum biopolymer nanocatalyst was carried out by vibrating sample magnetometer (VSM) curves, energy-dispersive X-ray (EDX) analysis, Fourier transform infrared (FT-IR) spectroscopy, thermogravimetric analysis (TGA), powder X‐ray diffraction (XRD) pattern, field emission scanning electron micrograph (FESEM) image and ¹H and ¹³C nuclear magnetic resonance (NMR) spectra.

Keywords:

• Biopolymer
• magnetic nanocatalyst
• multicomponent reaction
• polysaccharide
• pyran
• xanthan gum

Acknowledgments

All authors are thankful to the Research Council of the Baqiyatallah University of Medical Sciences, the Iran University of Science and Technology (IUST) and the Iran National Science Foundation (INSF).

Disclosure statement

All authors express that they have no conflict of interest.