Facile synthesis of benzofurans via copper-catalyzed aerobic oxidative cyclization of phenols and alkynes
作者:Wei Zeng、Wanqing Wu、Huanfeng Jiang、Liangbin Huang、Yadong Sun、Zhengwang Chen、Xianwei Li
DOI:10.1039/c3cc42326c
日期:——
synthesis of polysubstituted benzofurans using a copper catalyst and molecular oxygen from phenols and alkynes in a one-pot procedure has been reported. The transformation consists of a sequential nucleophilic addition of phenols to alkynes and oxidative cyclization. A wide variety of phenols and alkynes can be used in the same manner.
Direct Access to Benzo[<i>b</i>]furans through Palladium-Catalyzed Oxidative Annulation of Phenols and Unactivated Internal Alkynes
作者:Malleswara Rao Kuram、M. Bhanuchandra、Akhila K. Sahoo
DOI:10.1002/anie.201210217
日期:2013.4.22
2,3‐Disubstituted benzo[b]furans are prepared in one step from commercially available phenols and readily accessible unactivatedinternalalkynes (see scheme). This Pd‐catalyzed oxidativeannulation has a broad substrate scope and allows access to a wide range of benzo[b]furans.
2,3-二取代的苯并[ b ]呋喃一步一步由市售的苯酚和易于获得的未活化内部炔烃制得(参见方案)。这种Pd催化的氧化环化具有广泛的底物范围,并允许使用各种苯并[ b ]呋喃。