Catalytic Asymmetric Dihydroxylation Using Phenoxyethoxymethyl-polystyrene (PEM)-Based Novel Microencapsulated Osmium Tetroxide (PEM-MC OsO4)
- 21 July 2001
- journal article
- letter
- Published by American Chemical Society (ACS) in Organic Letters
- Vol. 3 (17) , 2649-2652
- https://doi.org/10.1021/ol0161965
Abstract
A phenoxyethoxymethyl-polystyrene (PEM)-based novel polymer-supported osmium catalyst has been developed. The catalyst was readily prepared from PEM polymer based on a microencapsulation technique, and asymmetric dihydroxylation of olefins has been successfully performed using (DHQD)2PHAL as a chiral ligand and K3Fe(CN)6 as a cooxidant in H2O/acetone. The catalyst was recovered quantitativery by simple filtration and reused without loss of activity several times.Keywords
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