application： Bis(3,5-dimethylphenyl)phosphine can be used as a reactant to prepare: Iron(II) chiral diimine diphosphine complexes as catalysts for the asymmetric transfer hydrogenation of ketones. The complex of iridium with biphenol phosphite-phosphine bidentate ligand as an asymmetric catalyst for the hydrogenation of N-arylimines. Chiral phosphines with excellent stereoselectivity by 1, 4 addition reaction with α,β-unsaturated aldehydes using a palladium catalyst.