Chiral phosphoric acid-catalyzed enantioselective [5+1] cycloaddition reaction of C, N-cyclic azomethine imines with isocyanides

Chem Commun (Camb). 2024 Feb 29;60(19):2637-2640. doi: 10.1039/d3cc05890e.

Abstract

The first catalytic enantioselective [5+1] cycloaddition reactions of C,N-cyclic azomethine imines with isocyanides are reported herein. The method displays a broad substrate scope and atom-economy. A series of chiral tetrahydroisoquinoline containing indole skeletons were obtained in up to 90% yield with 95% ee under mild reaction conditions. A possible catalytic model was also proposed.