描述了通过5-取代-1,2,3-三碘苯和苄基酮的高度区域选择性串联 α-芳基化/分子内O-芳基化轻松有效地合成 7-碘苯并[ b ]呋喃衍生物。值得注意的是,α-芳基化偶联反应仅在三碘芳烃空间位阻最少的位置引发,这导致高度化学选择性的转化。在缺电子 1,2,3-三碘芳烃和富电子苄基酮之间的反应中观察到最高产率,但优化的反应条件被发现能够耐受多种不同的官能团。这种由 1,2,3-三碘苯合成 7-碘苯并[ b ]呋喃的史无前例的合成方法具有可扩展性、通用性,并且可以轻松获得用于其他化学转化的有价值的前体。
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.