Used as a chiral ligand in asymmetric catalysis, particularly in enantioselective transformations such as conjugate additions and aldol reactions. Its rigid structure and well-defined stereochemistry make it effective in inducing high enantioselectivity when complexed with metals like copper or nickel. Commonly employed in pharmaceutical synthesis where precise stereochemical control is critical. The tartrate salt form enhances solubility and stability, facilitating handling and reproducibility in reaction conditions.