Enantioselective C–H Amination Catalyzed by Nickel Iminyl Complexes Supported by Anionic Bisoxazoline (BOX) Ligands
作者:Yuyang Dong、Colton J. Lund、Gerard J. Porter、Ryan M. Clarke、Shao-Liang Zheng、Thomas R. Cundari、Theodore A. Betley
DOI:10.1021/jacs.0c09839
日期:2021.1.20
Investigation of 6 via single-crystal X-ray crystallography, NMR and EPR spectroscopies, and computations revealed a Ni(II)-iminyl radical formulation, similar to its dipyrrinato congener. Complex 4 exhibits enantioselective intramolecular C-H bond amination to afford N-heterocyclic products from 4-aryl-2-methyl-2-azidopentanes. Catalytic C-H amination occurs under mild conditions (5 mol % catalyst, 60 °C)