Synthesis of axially chiral N-aryl benzimidazoles via chiral phosphoric acid catalyzed enantioselective oxidative aromatization

N -aryl benzimidazoline produced in situ was used as a H 2 donor, which was converted to C–N axially chiral N -aryl benzimidazole by CPA-catalyzed enantioselective transfer hydrogenation of the in situ produced imine.