Palladium-catalyzed site-selective hydrogen isotope exchange (HIE) reaction of arylsulfonamides using amino acid auxiliary
作者:Wei Liu、Xingyu Xu、Hongyan Zhao、Xiaoyu Yan
DOI:10.1016/j.tet.2018.06.024
日期:2018.7
Hydrogen isotope exchange (HIE) is a versatile method for the introduction of deuterium to organic compounds. Herein, regioselective deuteration of sulfonamides is achieved by palladium-Catalyzed HIE reaction. By using amino acid as weakly coordination-directing auxiliary, a variety of sulfonamides are efficiently deuterated at the ortho-position. Placing competing directing groups on the aromatic
氢同位素交换(HIE)是将氘引入有机化合物的一种通用方法。在本文中,磺酰胺的区域选择性氘化是通过钯催化的HIE反应实现的。通过使用氨基酸作为弱配位导向助剂,多种磺酰胺在邻位被有效地氘化。在芳族环上放置竞争性的导向基团不影响位点选择性。