title: Osmium tetroxide-(QN)2PHAL in an ionic liquid: a highly efficient and recyclable catalyst system for asymmetric dihydroxylation of olefins.
abstract: In Os-catalysed asymmetric dihydroxylation using NMO as a co-oxidant, the combination of an ionic liquid and the new bis-cinchona alkaloid 2 generated in situ from (QN)2PHAL during reaction provided a simple and practical approach to the recycling of both catalytic components (osmium tetraoxide and chiral ligand).
authors.affiliation: Life Sciences Division, Korea Institute of Science and Technology, PO Box 131, Cheongryang, Seoul 130-650, Korea.
authors.forename: Choong Eui
authors.initials: CE
authors.lastname: Song
authors.forename: Da-un
authors.initials: DU
authors.lastname: Jung
authors.forename: Eun Joo
authors.initials: EJ
authors.lastname: Roh
authors.forename: Sang-gi
authors.initials: SG
authors.lastname: Lee
authors.forename: Dae Yoon
authors.initials: DY
authors.lastname: Chi