title: Cu(II)-aza(bisoxazoline)-catalyzed asymmetric benzoylations.
abstract: [reaction: see text] Racemic 1,2-diols and alpha-hydroxy carbonyl compounds can be asymmetrically benzoylated in a kinetic resolution in the presence of various Cu(II)-aza(bisoxazoline) catalysts. A novel bisbenzyl-substituted aza(bisoxazoline) ligand proved to be especially effective when immobilized on MeOPEG(5000), giving from 91 to > or = 99% ee in 37-49% yield for each of five sequential reactions.
authors.affiliation: Institut für Organische Chemie der Universität Regensburg, Universitätsstrasse 31, D-93053 Regensburg, Germany.
authors.forename: Anja
authors.initials: A
authors.lastname: Gissibl
authors.forename: M G
authors.initials: MG
authors.lastname: Finn
authors.forename: Oliver
authors.initials: O
authors.lastname: Reiser