Three BINOL-derived phosphoric acids exhibiting atropisomerism in the 3,3′-positions were obtained by Suzuki coupling reaction. The diastereomeric mixture was resolved by HPLC. Structural assignment was achieved by NOE-NMR analysis and by TD-DFT simulation of the electronic circulardichroism (ECD) spectra. The three atropisomeric catalysts were tested in three enantioselective reactions, comparing
The asymmetric Povarov reaction of N-arylimines with 2- and 3-vinylindoles has been developed using a chiral phosphoric acid ((S)-TRIP) as catalyst. The peculiar reactivity of vinylindoles allowed also the disclosure of a Povarov Friedel–Crafts sequence, and the trapping of the reaction intermediate with nucleophilic species, thus providing a versatile platform for the preparation of highly enantioenriched indole derivatives.