Guanidine/Pd(OAc)<sub>2</sub>-Catalyzed Room Temperature Suzuki Cross-Coupling Reaction in Aqueous Media under Aerobic Conditions
作者:Shenghai Li、Yingjie Lin、Jungang Cao、Suobo Zhang
DOI:10.1021/jo0626257
日期:2007.5.1
A highly efficient Pd(OAc)2/guanidine aqueous system for the room temperature Suzuki cross-coupling reaction has been developed. The new water-soluble and air-stable catalyst Pd(OAc)2·(1f)2 from Pd(OAc)2 and 1,1,3,3-tetramethyl-2-n-butylguanidine (1f) was synthesized and characterized by X-ray crystallography. In the presence of Pd(OAc)2·(1f)2, coupling of arylboronic acids with a wide range of aryl
已开发出一种用于室温Suzuki交叉偶联反应的高效Pd(OAc)2 /胍水溶液体系。合成了由Pd(OAc)2和1,1,3,3-四甲基-2-正丁基胍(1f)制成的新型水溶性且空气稳定的催化剂Pd(OAc)2 ·(1f)2 X射线晶体学。在Pd(OAc)2 ·(1f)2存在下在水性溶剂中顺利进行了芳基硼酸与各种芳基卤化物的偶合,包括芳基碘化物,芳基溴化物,甚至是活化的芳基氯化物,以提供优良至优异的收率和高周转率(TONs)的交叉偶联产物)(1-碘-4-硝基苯与苯基硼酸反应的TONs高达850 000)。此外,这种温和的方案可以耐受广泛的官能团。