Abstract

The synthesis of a novel soluble polymer-bound ligand DHQD-PHAL-OPEG-OMe and its application in the catalytic asymmetric dihydroxylation (AD) reaction are described. 1,4-Dichlorophthalazine was used as the coupling reagent to connect dihydroquinidine and polyethylene glycol monomethyl ether (MW=5000, Fluka) while providing an aromatic group at the 9- O-position of dihydroquinidine. Enantiomeric excesses for trans-disubstituted olefins in the AD reaction, with K 3Fe(CN) 6 as secondary oxidant, are up to 98%.

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