(1aS,4aS,9bS)-10-(Bis(3,5-di-tert-butylphenyl)phosphanyl)-N-((3-methylpyridin-2-yl)methyl)-1,3,4,4a,5,13c-hexahydro-2H-indeno[2,1-d]fluoren-9-amine is a chiral phosphine ligand for enantioselective synthesis with high yield and high enantioselective results.