Rhodium-Catalyzed Tandem Asymmetric Allylic Decarboxylative Addition and Cyclization of Vinylethylene Carbonates with N -Nosylimines.

A enantioselective tandem transformation, concerning asymmetric allylic decarboxylative addition and cyclization of N -nosylimines with vinylethylene carbonates (VECs), in the presence of [Rh(C 2 H 4 ) 2 Cl] 2 , chiral sulfoxide- N -olefin tridentate ligand has been developed. The reaction of VECs with various substituted N -nosylimines proceeded smoothly under mild conditions, providing highly functionalized oxazolidine frameworks in good to high yields with good to excellent enantioselectivity.