Abstract
A facile copper-catalyzed amination in C-3 position of 2H-indazoles using commercially available N-fluorobenzenesulfonimide (NFSI) as an amidating reagent was established in this paper. The results revealed broad substrate scope in moderate to good yields under mild conditions. The described procedure involves a radical addition process whereby new CN bonds are formed, and it provides a new protocol for the synthesis of functionalized 2H-indazoles.
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