Highly Enantioslective Synthesis of Multisubstituted Polyfunctional Dihydropyrrole via an Organocatalytic Tandem Michael/Cyclization Sequence

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.