3398-33-2Relevant articles and documents
Synthesis, rhodium complexes and catalytic applications of a new water-soluble triphenylphosphane-modified β-cyclodextrin
Legrand, Francois-Xavier,Six, Natacha,Slomianny, Christian,Bricout, Herve,Tilloy, Sebastien,Monflier, Eric
, p. 1325 - 1334 (2011/07/09)
A new triphenylphosphane based on a β-cyclodextrin skeleton (PM-β-CD-OTPP) was synthesized. This ligand can be dispersed in water by using the nanoprecipitation method. Transmission electron microscopy and NMR spectroscopy showed that PM-β-CD-OTPP is aggregated in water and forms a stable dispersion. Its aqueous solubility can be dramatically increased in the presence of selected water-soluble guests by formation of inclusion complexes. Associated to a rhodium precursor, PM-β-CD-OTPP is able to generate soluble rhodium species in water. In addition, NMR experiments showed that the cyclodextrin cavity remains accessible for a guest even when PM-β-CD-OTPP is coordinated to rhodium. Finally, this ligand was efficient for rhodium-catalyzed hydrogenation and hydroformylation performed in aqueous medium.