Abstract
The layered double hydroxides (LDHs) are able to promote the sulfoxidation of thioethers and thiophene derivatives with hydrogen peroxide in the presence of acetonitrile. The last serves both as reagent and solvent. The active species in the oxidation reaction is the peroxyimidic acid arising from the addition of hydrogen peroxide to acetonitrile promoted by LDH as base catalyst. The reactivity of sulfur compounds in the sulfoxidation reaction with H 2 O 2 is correlated to the nucleophilicity of the sulfur atom, so that diarylsulfides are more easily oxidized than dibenzothiophene. A competition between the sulfoxidation reaction and the direct decomposition of hydrogen peroxide has been observed.
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