difosfine eteroaromatiche as chiral ligands, complexes between these difosfine and transition metal, and use of these complexes as catalysts, chiral

摘要

difosfine chiral consisting of an aromatic pentatomico bieterociclico system which can be used as chiral ligands.the complex between these difosfine and transition metals, and their use as chiral catalysts in reactions such as reduction reactions take stereocontrollate - stereo - and enantioselettive.process for the preparation of these chiral difosfine and process for the preparation of these complexes and their use as chiral catalysts in reactions stereocontrollate.