Helical Chiral Polymers without Additional Stereogenic Units: A New Class of Ligands in Asymmetric Catalysis

Abstract

No other sources of chirality except its helicity are present in the polymeric ligand shown, which was prepared by helix-sense-selective polymerization. Palladium complexes of this ligand catalyze allylic substitution reactions. The resulting asymmetric induction is a direct and sole consequence of the uniform helicity of the polymeric ligand.