Recyclable 2nd generation ionic liquids as green solvents for the oxidation of alcohols with hypervalent iodine reagents

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• 作者：Yadav ; J.S. ; Reddy ; B.V.S. ; Basak ; A.K. ; Venkat Narsaiah ; A.
• 关键词：Dess&ndash ; Martin-Periodinane ; Iodoxybenzoic acid ; Iodosobenzoic acid
• 刊名：Tetrahedron
• 出版年：2004
• 出版时间：February 23, 2004
• 年：2004
• 卷：60
• 期：9
• 页码：2131-2135
• 全文大小：166 K

文摘

Alcohols undergo smooth oxidation with iodoxybenzoic acid (IBX) or with Dess–Martin-Periodinane (DMP) in hydrophilic [bmim]BF₄ and hydrophobic [bmim]PF₆ ionic liquids at room temperature under mild conditions to afford the corresponding carbonyl compounds in excellent yields with high selectivity. IBX and DMP promoted oxidations are faster in ionic liquids when compared to conventional solvents such as DMSO, DMF, EtOAc and H₂O. The recovery of the byproduct iodosobenzoic acid (IBA) is especially simple in ionic liquids. The recovered ionic liquids can be recycled in subsequent reactions with consistent activity.