Synthesis of Sulfoxides in Water by New Magnetic Nanoparticles Supported Tungstic Acid (MNP-TA), as a Selective Oxidation Method of Sulfides


1 Department of Chemistry, Imam Hossein University, Tehran, Iran

2 Department of Chemistry, Tehran University, Tehran, Iran


Different sulfides were oxidized to the corresponding sulfoxides, which is useful in drug industries
and important in biological activities, with a novel magnetically separable catalyst consisting of
tungstic acid supported on silica coated magnetic nanoparticles in water as a green solvent in a good
to excellent yield without any over oxidation to sulfones in a simple, selective, and eco-friendly
way. The catalyst can be separated from reaction condition using an external magnetic field and
reused for several times as its first structure. Using some different microscopic and spectroscopic
techniques such as transmission electron microscopy (TEM), scanning electron microscopy (SEM),
Fourier transform infrared spectroscopy (FT-IR), X-ray powder diffraction (XRD), and EDX