(11bR)-N-[(1S,2R)-2-[(4-Bromophenyl)thio]-1,2-diphenylethyl]-N-(phenylmethyl)-2,6-diiodo-dinaphtho[2,1-d:1′,2′-f][1,3,2]dioxaphosphepin-4-amine is a chiral phosphine ligand for enantioselective synthesis with high yield and high enantioselective results.