Efficient C–H Amination Catalysis Using Nickel-Dipyrrin Complexes
作者:Yuyang Dong、Ryan M. Clarke、Gerard J. Porter、Theodore A. Betley
DOI:10.1021/jacs.0c02126
日期:2020.6.24
multi-nuclear NMR spectroscopy observed during catalysis. The activation parameters (ΔH≠ = 13.4 ± 0.5 kcal/mol; ΔS≠ = -24.3 ± 1.7 cal/mol·K) were measured using Eyring analysis, implying a highly ordered transitionstateduring the HAA step. The proposed mechanism of rapid iminyl formation, rate-determining HAA, and subsequent radical recombination was corroborated by intramolecular isotope labeling experiments