Palladium-Catalyzed <i>Para</i>-C–H Bond Amination of 2-Aryl Chloromethylbenzenes
作者:Yingqi Wang、Sheng Zhang、Xiujuan Feng、Xiaoqiang Yu、Masahiko Yamaguchi、Ming Bao
DOI:10.1021/acs.joc.2c01233
日期:2022.8.5
Palladium-catalyzed para-C–H bond amination of 2-aryl chloromethylbenzenes is described for the first time. The reactions of 2-aryl chloromethylbenzenes with cyclic amines proceeded smoothly in the presence of Pd(acac)2, tri(2-furyl)phosphine, and NaH in tetrahydrofuran at 40 °C to provide para-C–H bond aminated products in satisfactory to high yields with acceptable regioselectivity in most cases
首次描述了钯催化的 2-芳基氯甲基苯的对-C-H 键胺化。在 Pd(acac) 2 、三(2-呋喃基)膦和 NaH的存在下,2-芳基氯甲基苯与环胺的反应在四氢呋喃中于 40 ℃顺利进行,得到对位-C-H键胺化产物,结果令人满意。在大多数情况下具有可接受的区域选择性的高产率。与苯环相连的取代基的电子性质对2-芳基氯甲基苯底物的反应性和反应区域选择性没有显着影响。