Synthesis of 9- and 27-Armed Tetrakis(diperoxotungsto)phosphate-Cored Dendrimers and Their Use as Recoverable and Reusable Catalysts in the Oxidation of Alkenes, Sulfides, and Alcohols with Hydrogen Peroxide
作者:Sylvain Nlate、Lauriane Plault、Didier Astruc
DOI:10.1002/chem.200500556
日期:2006.1.11
[PO(4)[WO(O(2))(2)](4)](3-) in the core. These POM-cored dendrimers are air-stable, efficient, recoverable, and reusable catalysts for the selective oxidation of alkenes to epoxides, sulfides to sulfones, and alcohols to ketones, in an aqueous/CDCl(3) biphasic system with hydrogenperoxide as the primary oxidant. A study of the countercation effects showed that the dendritic structure increased the