Au-catalyzed synthesis of benzofurans from phenols and alkynes using molecular oxygen
作者:Jinqiang Liao、Pengfeng Guo、Qinlin Chen
DOI:10.1016/j.catcom.2016.01.009
日期:2016.3
An efficient Au-catalyzed transformation for the synthesis of benzofuransfromphenols and alkynes using molecular oxygen has been developed. The reaction proceeds smoothly with commercially available, eco-friendly oxidant and affords the products in moderate to good yields. This reaction is a facile approach for the formation of C − C and C–O bonds.
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.
Benzofuran synthesis via copper-mediated oxidative annulation of phenols and unactivated internal alkynes
作者:Ruyi Zhu、Jiangbo Wei、Zhangjie Shi
DOI:10.1039/c3sc51489g
日期:——
example of copper-mediated oxidativeannulation of phenols and unactivatedinternalalkynes to afford benzofuran derivatives was reported. Various phenols and unactivatedinternalalkynes were successfully employed. Mechanistic studies disclosed a new strategy on annulations of alkynes with phenolsthrough reversible electrophilic carbocupration of phenol followed by alkyne insertion and cyclization
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。
Condensations of benzil with phenols and aryl ethers mediated by tin(IV) chloride pentahydrate
作者:Brian J Morrison、Oliver C Musgrave
DOI:10.1016/s0040-4020(02)00357-5
日期:2002.5
The reaction of benzil with phenol at 180°C in the presence of SnCl4·5H2O produces a benzofuran, a benzofuranol, a benzodifuran, and a benzofuranone. Anhydrous tin(IV) chloride also gives a benzofuranofuranone. Other phenols and their methyl ethers yield related products. The good yields of the benzo- and naphtho-furanones make the method an attractive alternative to the benzilic acid route to such