Enantioresolution of 2,2′-Bis(diphenylphosphino)-1,1′-binaphthyl Oxide Using Inclusion Complex with Chiral 2,2′-Dihydroxy-1,1′-binaphtyl

An enantioresolution of 2,2′-bis­(diphenylphosphino)-1,1′-binaphthyl oxide (BINAPO) into its enantiomers was achieved using the inclusion complex with a commercially available chiral 2,2′-dihydroxy-1,1′-binaphthyl ((R)-BINOL), giving the two enantiomers with 99% ee and 72% ee, respectively.