Selective sulfoxidation of aryl sulfides by coordinatively unsaturated metal centers in chromium carboxylate MIL-101
The nanoporous chromium carboxylate MIL-101 with coordinatively unsaturated chromium sites has been shown to be active in the sulfoxidation of aryl sulfides with H2O2 to selectively produce the corresponding sulfoxides. Interestingly, the electron-releasing groups in the oxygenation reaction of para-X-phenylmethyl sulfoxides (X-Ph-S-CH3, X = CH3, H, NO2, and CN) enhanced the oxidation reactivity in 1:1 mixtures of X-Ph-S-CH3:H-Ph-S-CH3. Moreover, the 18O-labeled experiments to understand the source of oxygen in sulfoxide products proved that the oxygen atom in the sulfoxide product was entirely derived from H2O2.
Graphical abstractThe chromium(III) carboxylate MIL-101 with coordinatively unsaturated sites (CUS) has shown to be active in the sulfoxidation of aryl sulfides with H2O2 to selectively produce the corresponding sulfoxides.Figure optionsDownload full-size imageDownload as PowerPoint slide
Journal: Applied Catalysis A: General - Volume 358, Issue 2, 1 May 2009, Pages 249–253