Brønsted Acid Catalyzed Enantioselective α-Amidoalkylation in the Synthesis of Isoindoloisoquinolines
摘要:
The Parham cyclization-intermolecular alpha-amidoalkylation sequence results in the facile enantioselective synthesis of 12b-substituted isoindoloisoquinolines (ee up to 95%) using BINOL-derived Bronsted acids. alpha-Amidoalkylation of indole occurs through :he formation of a chiral conjugate base/bicyclic quaternary N-acyliminium ion pair.