Selective and mild oxidation of sulfides to sulfoxides or sulfones using H₂O₂ and Cp′Mo(CO)₃Cl as catalysts

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• 作者：Carla A. Gamelas ; Tiago Louren&#xe7 ; o ; Andr&#xe9 ; Pontes da Costa ; Ana L. Simpl&#xed ; cio ; Beatriz Royo ; Carlos C. Rom&#xe3 ; o
• 关键词：Sulfoxide ; Sulfone ; Hydrogen peroxide ; Molybdenum complexes
• 刊名：Tetrahedron Letters
• 出版年：2008
• 出版时间：4 August 2008
• 年：2008
• 卷：49
• 期：32
• 页码：4708-4712
• 全文大小：211 K

文摘

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 f"" alt=""less-than-or-equals, slant"" title=""less-than-or-equals, slant"" border=""0""> 15). The same conclusion is drawn from competition experiments with a mixture of p-ClC₆H₄SCH₃ and C₆H₅SOCH₃.