Simple N-sulfinyl-based chiral sulfur-olefin ligands for rhodium-catalyzed asymmetric 1,4-additions.

A variety of N-sulfinyl-based chiral sulfur-olefin ligands has been successfully developed for the first time for rhodium-catalyzed highly efficient and enantioselective 1,4-additions. The ease of synthesis and needless consideration of the carbon chirality makes this novel type of ligands attractive for asymmetric catalysis.