(3aS,8aS)-( )-4,4,8,8-Tetrakis(3,5-dimethylphenyl)tetrahydro-2,2-dimethyl-6-phenyl-1,3-dioxolo[4,5-e]dioxaphosphepin is a chiral phosphine ligand for enantioselective synthesis with high yield and high enantioselective results.