Selective and mild oxidation of sulfides to sulfoxides or sulfones using H2O2 and Cp′Mo(CO)3Cl as catalysts |
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Authors: | Carla A Gamelas Tiago Lourenço Ana L Simplício Carlos C Romão |
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Institution: | a Instituto de Tecnologia Química e, Biológica da Universidade Nova de Lisboa, Av. República, EAN, 2780-157 Oeiras, Portugal b Escola Superior de Tecnologia, Instituto Politécnico de Setúbal, 2910-761 Setúbal, Portugal |
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Abstract: | Dialkyl, aryl-alkyl, benzylic, and benzothiophenic sulfides are selectively oxidized to sulfoxides or sulfones, with stoichiometric amounts of H2O2 (aq) or TBHP, in the presence of complexes Cp′Mo(CO)3Cl, CpMoO2Cl and the mesoporous material MCM-41-2 as catalysts. The use of the thianthrene 5-oxide (SSO) probe shows that CpMo(CO)3Cl/H2O2 or TBHP are electrophilic oxidants (Xso ? 15). The same conclusion is drawn from competition experiments with a mixture of p-ClC6H4SCH3 and C6H5SOCH3. |
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Keywords: | Sulfoxide Sulfone Hydrogen peroxide Molybdenum complexes |
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