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Published on: April 28, 2023
Copper-Mediated C-H Amination of Imidazopyridines with N-Fluorobenzenesulfonimide
Shuai Lu1, Lu-Lu Tian1, Tian-Wei Cui1
1College of Chemistry and Molecular Engineering , Zhengzhou University , No. 100 Science Road , Zhengzhou , Henan 450001 , P. R. China.
Abstract:
A copper-mediated direct C3 amination of imidazopyridines has been disclosed under additive-free conditions in short reaction times. This methodology utilizes commercially available N-fluorobenzenesulfonimide (NFSI) as the amino source, which exhibits broad substrate scope and good functional group tolerance. The obtained C3-aminated imidazopyridines can undergo further desulfonylation transformations. Control experiments suggest that this reaction probably proceeds via a free-radical mechanism. Moreover, NFSI also shows potential application in C-H fluorination of imidazopyridines.
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