Highly enantioslective synthesis of multisubstituted polyfunctional dihydropyrrole via an organocatalytic tandem Michael/cyclization sequence

摘要

A unique approach to asymmetric synthesis of various optically pure multisubstituted 2,3-dihydropyrroles catalyzed by a novel rosin-derived tertiary amine-thiourea via a tandem Michael/cyclization sequence with high yield (up to 97%) and good to excellent enantioselectivities (up to 97% ee) is present. This strategy provides an efficient and convenient method to access enantioenrich nitrogen heterocycles.