Transition-metal-free regioselective C-H halogenation of imidazo[1,2-: A] pyridines: Sodium chlorite/bromite as the halogen source
A facile transition-metal-free regioselective halogenation of imidazo[1,2-a]pyridines using sodium chlorite/bromite as the halogen source is presented. The reaction has provided an efficient method for the formation of C-Cl or C-Br bonds to synthesize 3-c