A novel poly(ethyleneoxide)-based magnetic nanocomposite catalyst for highly efficient multicomponent synthesis of pyran derivatives Ali Maleki Mojtaba Azizi Zeynab Emdadi 10.6084/m9.figshare.7381415.v1 https://tandf.figshare.com/articles/journal_contribution/A_novel_poly_ethyleneoxide_-based_magnetic_nanocomposite_catalyst_for_highly_efficient_multicomponent_synthesis_of_pyran_derivatives/7381415 <p>In the present work, a new magnetically recyclable nanocomposite catalyst was designed, prepared, and characterized by Fourier transform infrared (FT-IR) spectroscopy, field-emission scanning electron microscopy (FE-SEM) images, X-ray diffraction (XRD) pattern, energy-dispersive X-ray (EDX), vibrating sample magnetometer (VSM), and transmission electron microscopy (TEM) analyses. Then, the catalytic activity of the prepared Fe<sub>3</sub>O<sub>4</sub>/PEO/SO<sub>3</sub>H nanocatalyst was examined on multicomponent synthesis of 2-amino-3-cyano-4H-pyranes. Short reaction time, room temperature, good-to-excellent yields, easy catalyst separation and catalyst reusability, environmentally benign and efficient conditions are some advantages of this green protocol.</p> 2018-11-26 15:56:14 Nanocatalyst multicomponent reaction Fe3O4/PEO/SO3H pyran green chemistry