Cationic Palladium Complex‐Catalyzed Diastereoselective Tandem Annulation of 2‐Iminoarylboronic Acids with Substituted Alkynes: Enantioselective Synthesis of Aminoindene Derivatives by Double Asymmetric Induction

The tandem annulation reaction of 2‐iminoarylboronic acids and alkynes was developed for the synthesis of aminoindene derivatives catalyzed by cationic palladium complex. In addition, an enantioselective synthesis of aminoindene derivatives from the reaction of substituted ( S )‐2‐( N ‐ tert ‐butanesulfinylimino)arylboronic acids with a variety of alkynes catalyzed by chiral cationic palladium complex was also achieved by the double asymmetric induction.