Fig. 1: Asymmetric construction of indole-based biaryls via cycloaddition strategies.

a Construction of indole derivatives via intramolecular cyclization. b CPA-catalyzed atroposelective intermolecular [3 + 2] cycloaddition.
a Construction of indole derivatives via intramolecular cyclization. b CPA-catalyzed atroposelective intermolecular [3 + 2] cycloaddition.