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Ru–η6-benzene–phosphine complex-catalyzed transfer hydrogenation of ketones

✍ Scribed by Lei Wang; Qin Yang; Hai-Yan Fu; Hua Chen; Mao-Lin Yuan; Rui-Xiang Li

Publisher
John Wiley and Sons
Year
2011
Tongue
English
Weight
210 KB
Volume
25
Category
Article
ISSN
0268-2605

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✦ Synopsis

Abstract

Three Ru–η^6^‐benzene–phosphine complexes bearing tri‐(p‐methoxyphenyl)phosphine, triphenylphosphine and tri‐(p‐trifluoromethylphenyl)phosphine were synthesized and characterized by ^31^P{^1^H} NMR, ^1^H NMR, ^13^C{^1^H} NMR and elemental analyses. Complex 1 was further identified by X‐ray crystallography. These complexes exhibit good to excellent activities for the transfer hydrogenation of ketones in refluxing 2‐propanol, and the highest turnover frequency (TOF) is up to 5940 h^−1^. The effect of electronic factors of these complexes on the transfer hydrogenation of ketones reveals that the catalytic activity is promoted by electron‐donating phosphine and the catalyst stability is improved by electron‐withdrawing phosphine. Copyright © 2011 John Wiley & Sons, Ltd.

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