The synthesis and structure of pyridine-oxadiazole iridium complexes and catalytic applications: Non-coordinating-anion-tuned selective C N bond formation
作者:Wei Yao、Yilin Zhang、Haiyan Zhu、Chenyang Ge、Dawei Wang
DOI:10.1016/j.cclet.2019.08.049
日期:2020.3
Abstract Several novel pyridine-oxadiazole iridium complexes were synthesized and characterized through X-ray crystallography. The designed iridium complexes revealed surprisingly high catalytic activity in C N bondformation of amides and benzyl alcohols with the assistance of non-coordinating anions. In an attempt to achieve borrowing hydrogen reactions of amides with benzyl alcohols, N,N'-(phenylmethylene)dibenzamide
摘要合成了几种新颖的吡啶-恶二唑铱配合物,并通过X射线晶体学表征。设计的铱配合物在非配位阴离子的辅助下,在酰胺和苄醇的CN键形成中显示出惊人的高催化活性。为了实现酰胺与苄醇的借位氢反应,在非配位阴离子条件下意外地分离出N,N'-(苯基亚甲基)二苯甲酰胺产物,而在不存在非配位阴离子的情况下获得了N-苄基苯甲酰胺产物。机理探索排除了“银效应”(银辅助或双金属催化)的可能性,并揭示了铱催化剂的反应性因非配位阴离子而变化。