Chiral Brønsted Acid-Catalyzed Asymmetric Trisubstituted Aziridine Synthesis Using α-Diazoacyl Oxazolidinones

Despite the remarkable advances in catalytic asymmetric aziridinations over the past decades, establishing a general procedure for the stereoselective synthesis of trisubstituted aziridines has remained an elusive goal. Chiral N-triflyl phosphoramide-catalyzed reactions of N-α-diazoacyl oxazolidinones and N-Boc imines were developed as a solution to this unmet challenge.