名称:
Novel chiral water soluble phosphines I. Preparation and characterization of amine functionalized DIOP, Chiraphos, and BDPP derivatives and quaternization of their rhodium complexes
摘要:
Synthetic details for the preparation of tetra-amine functionalized derivatives of the ligands BDPP, Chiraphos, and DIOP (2,4-bis(-bis(-p-N,N-dimethylaminophenyl)phosphino)pentane; 2,3-bis(-bis(-p-N,N-dimethylaminophenyl)-phosphino)butane; and 2,3-O-isopropylidene-2,3-dihydroxy-1,4-bis(-bis(-p-N,N-dimethylaminophenyl)phosphino)-butane; respectively). The ligands are conveniently quaternized in their rhodium diene complexes with (CH3)3OBF4. Both the methyl quaternized and proton quaternized versions of the rhodium complexes have unlimited water solubility.