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Synthesis of novel chiral macrocyclic ONNO-type ligands and use in asymmetric transfer hydrogenation

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Synthesis of novel chiral macrocyclic ONNO-type ligands and use in asymmetric transfer hydrogenation.htm (694bytes)
Date
2007-04
Author
Chen, Gui
Xing, Yan
Zhang, Hui
章慧
Gao, Jing-Xing
高景星
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  • 化学化工-已发表论文 [14235]
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Abstract
The interaction of 1,3-bis(2-formylphenoxy)-2-propanoI with chiral 1,2-diaminocyclohexane gave novel chiral macrocyclic ONNO-type ligands which were fully characterized by IR, NMR, MS and CD. The catalyst systems generated in situ from the chiral cyclic ONNO ligands and the iridium hydride complex [IrHCl2(COD)](2) have been used for the first time in the asymmetric transfer hydrogenation of aromatic ketones using 2-propanol as a source of hydrogen, giving the corresponding optically active alcohols with high chemical yields and good to excellent enantioselectivities (up to 92% ee). The reactions can be performed in air and the catalytic experiments are greatly simplified. (C) 2007 Elsevier B.V. All rights reserved.
Citation
JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL,2007,273(1-2):284-288
URI
http://dx.doi.org/doi:10.1016/j.molcata.2007.04.017
https://dspace.xmu.edu.cn/handle/2288/8977

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