Synthesis of Diiodinated Biphenyls and Iodinated<i>meta</i>-Terphenyls by Regioselective Suzuki-Miyaura Cross-Coupling Reactions of 5-Substituted 1,2,3-Triiodobenzenes
作者:Raed M. Al-Zoubi、Walid K. Al-Jammal、Mohammad Y. El-Khateeb、Robert McDonald
DOI:10.1002/ejoc.201500263
日期:2015.5
were synthesized by a regioselective Suzuki–Miyaura cross-coupling reaction of 5-substituted 1,2,3-triiodobenzenes. By using 1 equiv. of arylboronic acid, the Suzuki–Miyaura reaction yielded 2,3-diiodinated biphenyl derivatives with excellent regioselectivity. The coupling reaction predominantly occurred at the terminal position of the 5-substituted 1,2,3-triiodobenzene, which is the less sterically
通过 5-取代的 1,2,3-三碘苯的区域选择性 Suzuki-Miyaura 交叉偶联反应合成了多种 2,3-二碘化联苯和碘化间三联苯衍生物。通过使用 1 当量。Suzuki-Miyaura 反应生成了具有优异区域选择性的 2,3-二碘化联苯衍生物。偶联反应主要发生在 5-取代的 1,2,3-三碘苯的末端位置,这是空间位阻较小且电子缺陷较多的位点。2当量。芳基硼酸,一锅反应以良好的产率提供碘化的间三联苯。这种简便高效的一步法在范围和可扩展性方面也非常通用。