Advances in the late-stage functionalization of 2H-indazoles, including C3-functionalization, ortho C2′–H functionalization and remote C–H functionalization at the benzene ring of 2H-indazoles, are reviewed.
Herein, we report a t-BuONa-promoted method for the site-selective silylation of 2H-indazoles.
This review systematically discusses all of the visible light-induced functionalization methodologies and mechanisms of two significant heterocycles, indazole and pyrazole.
We report a regioselective remote difunctionalization of unreactive C–H bonds of 2H-indazoles with Koser's reagents to provide C-4,7 substituted 2H-indazole derivatives.
A general and efficient method for visible-light driven fluoroalkylation reactions such as mono-, difluoromethylation and perfluoroalkylation at the C-3 position of 2H-indazoles using the Mn2(CO)10 photocatalyst has been developed.