Asymmetric Multicomponent Sulfa-Michael/Mannich Cascade Reaction: Synthetic Access to 1,2-Diamino-3-Organosulfur Compounds and 2‑Nitro Allylic Amines

A novel catalytic asymmetric three-component intermolecular sulfa-Michael/Mannich cascade reaction has been developed using a chiral multifunctional catalyst. This reaction provides facile access to 1-amino-2-nitro-3-organosulfur compounds bearing three consecutive stereocenters in high yields (up to 96%) with good diastereo- (up to 91:4:4:1 <i>dr</i>) and excellent enantioselectivities (93–99% <i>ee</i>). Furthermore, the products of this reaction could be facilely transformed into potentially bioactive 1, 2-diamino-3-organosulfur compounds and 2-nitro allylic amines