作者:Huiying Zeng、Zemin Wang、Chao‐Jun Li
DOI:10.1002/anie.201813391
日期:2019.2.25
Transition metal catalyzed C−H functionalizations have been developed as powerful methods for C−C bond formations. Directing groups, removable directing groups, traceless directing groups, and transient directing groups (TDGs) have been successfully used to improve the reaction efficiencies. For the development of greener and more sustainable methods, C−H functionalization using a TDG that also serves
过渡金属催化的CH官能化已被开发为形成CC键的有力方法。导向基团,可移动的导向基团,无痕导向基团和瞬态导向基团(TDG)已被成功地用于提高反应效率。为了开发更绿色,更可持续的方法,研究了使用TDG的CH功能化,该TDG还可以用作水性溶剂中的试剂。使用酮在水中的钯催化的色胺类胺的CH-H官能化成功生成了四氢-β-咔啉,其四级碳中心位于C1。讨论了氘标记实验以提供对该机理的深入了解。吡啶的C2位也通过该策略成功地官能化。