Journal
CHEMISTRY LETTERS
Volume 38, Issue 9, Pages 904-905Publisher
CHEMICAL SOC JAPAN
DOI: 10.1246/cl.2009.904
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Funding
- Japan Society for the Promotion of Science (JSPS)
- Global COE Program
- University of Tokyo, MEXT, Japan
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Reversal of enantioselectivity in Cu-chiral bipyridine catalyzed asymmetric ring-opening reactions of meso-epoxides with indole and aniline derivatives was observed compared to Sc-chiral bipyridine catalyzed reactions, where the same chiral ligand was used. It was revealed from X-ray crystal structural analysis that a square pyramidal structure for the Cu(II) complex and a pentagonal bipyramidal structure for the Sc(III) complex were formed, which could explain the reversal of the enantioselectivity.
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