Tetrahedron Letters p. 3669 - 3671 (2002)
Update date:2022-08-11
Topics:
Kuang, Yong-Qing
Zhang, Sheng-Yong
Jiang, Ru
Wei, Ling-Ling
A free cinchona alkaloid derivative, which can be recovered and reused in the same way as the reported soluble polymer-supported cinchona alkaloid-derived ligands, was applied to the homogeneous asymmetric dihydroxylation of olefins. The molar ratio of ligand/olefin was 5%, being much lower than that required for the corresponding soluble polymer-supported ligands (10-25%). Yields of 82-93% and ees of 89-99% have been obtained.
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