Zwitterionic Metal Complexes of the New Triphosphine NaO3S(C6H4)CH2C(CH2PPh2)3 in Liquid Biphasic Catalysis: An Alternative to Teflon "Ponytails" for Facile Catalyst Separation without Water
摘要:
The new Ligand NaO3S(C6H4)CH2C(CH(2)PPh(2))(3) (sulphos) has been synthesized. The application of the zwitterionic Rh(I) complexes (sulphos)Rh(cod) and (sulphos)Rh(CO)(2) in liquid biphasic catalysts has been demonstrated for the hydrogenation of styrene and the hydroformylation of 1-hexene, respectively. The Latter reaction gives C-7 alcohols in an alcohol/hydrocarbon system and C-7 aldehydes in an alcohol-water/hydrocarbon system. All rhodium a's recovered in the polar phase at the end of the catalytic reactions.