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New Types of o-Carborane-Based Chiral Phosphinooxazoline (Cab-PHOX) Ligand Systems: Synthesis and Characterization of Chiral Cab-PHOX Ligands and Their Application to Asymmetric Hydrogenation

Authors
Lee, Jong-DaeCo, Thanh ThienKim, Tae-JeongKang, Sang Ook
Issue Date
17-Mar-2009
Publisher
GEORG THIEME VERLAG KG
Keywords
chiral phosphinooxazoline ligands; o-carborane-based bidentate ligands; asymmetric hydrogenation; unfunctionalized olefins; functionalized olefins
Citation
SYNLETT, no.5, pp.771 - 774
Indexed
SCIE
SCOPUS
Journal Title
SYNLETT
Number
5
Start Page
771
End Page
774
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/134700
DOI
10.1055/s-0028-1087934
ISSN
0936-5214
Abstract
o-Carborane-based chiral phosphinooxazoline (Cab-PHOX) ligands were synthesized for the first time and applied to the iridium and rhodium-catalyzed hydrogenation of unfunctionalized and functionalized olefins with an enantioselectivity of up to 98% and 96%, respectively. The modularity of the Cab-PHOX ligands is highlighted by the facile preparation of a variety of sterically and electronically different ligands.
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