Metal-free chemoselective oxidation of sulfides to sulfoxides catalyzed by immobilized taurine and homotaurine in aqueous phase at room temperature

Add time:08/30/2019    Source:sciencedirect.com

Natural products taurine and homotaurine were immobilized on the hybrid silica successfully and characterized by FT-IR, XPS, contact angle measurement, SEM, TGA, and XRD systematically. When the immobilized taurine ([email protected]) and homotaurine ([email protected]) were employed as heterogeneous catalysts in the oxidation of aromatic sulfides and aliphatic sulfides with 30% H2O2 at room temperature, up to 99.9% conversion and 98.0% selectivity were achieved with an excellent substrate tolerance. And the heterogeneous catalysts can be easily recycled up to 6 times without significant decrease in catalytic activity, which makes them promising catalysts for practical and large-scale applications in the oxidation of sulfides in aqueous phase at room temperature.

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