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 

机构地区：[1]Key Laboratory of Synthetic and Biological Colloids,Ministry of Education,School of Chemical and Material Engineering,Jiangnan University,Wuxi 214122,China [2]C.Eugene Bennett Department of Chemistry,West Virginia University,Morgantown,WV 26506,United States

出　　处：《Chinese Chemical Letters》2020年第3期701-705,共5页中国化学快报（英文版）

基　　金：financial support from the National Natural Science Foundation of China(Nos.21776111,21861039);the Fundamental Research Funds for the Central Universities(No.JUSRP 51627B);the Ministry of Education and the State Administration of Foreign Experts Affairs for the 111 Project(No.B13025)。

摘　　要：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 products we re unexpectedly isolated under non-coordinating anion conditions,whereas N-benzylbenzamide products were achieved in the absence of non-coordinating anions.The mechanism explorations excluded the possibility of"silver effect"(silver-assisted or bimetallic catalysis)and revealed that the reactivity of iridium catalyst was varied by non-coordinating anions.This work provided a convenient and useful methodology that allowed the iridium complex to be a chemoselective catalyst and demonstrated the first example of non-coordinating-anion-tuned selective C-N bond formation.

关 键 词：BORROWING hydrogen DEHYDROGENATION Non-coordinating ANION IRIDIUM Bisamides 

分 类 号：O641.4[理学—物理化学]