Fig. 1: Strategies for catalytic asymmetric synthesis of chiral 1,2,3-triazoles.

a Synthesis of chiral 1,4-disubstituted triazoles by enantioselective Cu-catalyzed Click reaction. b Synthesis of chiral 1,4,5-trisubstituted triazoles by enantioselective Ni-catalyzed Click reaction. c Synthesis of chiral 1,4,5-trisubstituted triazoles by atroposelective Rh/Ir-catalyzed Click reaction. d This work: synthesis of chiral 1,5-disubstituted triazoles (unexplored) and 1,4,5-trisubstituted triazoles by enantioselective Cu-catalyzed azidation/Click cascade. Cat. catalyst, L ligand, Cu copper, Ni nickel, Rh rhodium, Ir iridium.