Double Coupling Reactions of 3,4-Bis(stannyl)furanone: Facile Preparation of Diaryl- and Dibenzylfuranones
作者:J. Sweeney、Neil Carter、Ross Mabon、Rachel Walmsley、Alexandre Richecœur
DOI:10.1055/s-2006-944209
日期:2006.7
The palladium-catalyzed cross-coupling reaction of 3,4-bis(tributylstannyl)furan-2(5H)-one using chelating ligand or polar solvent gives mixtures of single and double coupled products, even when one equivalent of halide coupling partner is used. After optimization, the double coupling reaction was shown to be general, with the use of two equivalents of aryl iodides giving 3,4-disubstituted furanones
使用螯合配体或极性溶剂的 3,4-双(三丁基甲锡烷基)呋喃-2(5H)-one 的钯催化交叉偶联反应产生单偶联和双偶联产物的混合物,即使使用一当量的卤化物偶联伙伴. 优化后,双偶联反应被证明是通用的,使用两当量的芳基碘得到 3,4-二取代呋喃酮。使用苄基溴的反应比使用芳基碘的相应偶联反应在更低的温度下进行,得到二苄基呋喃酮。该方法已在 (±)-hinokinin 的合成中举例说明。