Regenerable and reusable dendritic catalysts have been synthesized by the ionic assembly of polyammonium dendrimers and polyoxometalate (POM) trianionic units. These dendrimers (see example depicted, in which the POM is [PO4{WO(O2)2}4]3−) are found to catalyze, at ambient temperature, the quantitative epoxidation of olefins by H2O2 in water/CDCl3 and the selective and quantitative oxidation of thioanisole to its sulfone.
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Plault et al. (2004) studied this question.
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