Highly Efficient Abnormal NHC Ruthenium Catalyst for Oppenauer-Type Oxidation and Transfer Hydrogenation Reactions

被引：34

作者：

Pardatscher, Lorenz ^{[1
]}

Hofmann, Benjamin J. ^{[1
]}

Fischer, Pauline J. ^{[1
]}

Hoelzl, Sebastian M. ^{[1
]}

Reich, Robert M. ^{[1
]}

Kuehn, Fritz E. ^{[1
]}

Baratta, Walter ^{[2
]}

机构：

[1] Tech Univ Munich, Dept Chem, Mol Catalysis & Catalysis Res Ctr, Lichtenbergstr 4, D-85747 Garching, Germany

[2] Univ Udine, Dipartimento DI4A, Via Cotonificio 108, I-33100 Udine, Italy

来源：

ACS CATALYSIS | 2019年 / 9卷 / 12期

关键词：

N-heterocyclic carbenes; alcohols; carbonyl compounds; ruthenium; Oppenauer-type oxidation; transfer hydrogenation; smart ligands; HETEROCYCLIC CARBENE COMPLEXES; SECONDARY ALCOHOLS; LIGANDS; BEARING; METATHESIS; ACTIVATION; KETONES;

D O I：

10.1021/acscatal.9b03677

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The ruthenium complex [Ru(OAc)(a-PC)(2)]Br (3) containing two abnormal NHC ligands is obtained by reaction of Ru(OAc)(2)(PPh3)(2) (1) with 1-(2-diphenylphosphinoethyl)-3-mesitylimidazolium bromide in the presence of NaOAc. Complex 3 catalyzes the Oppenauer-type oxidation of a number of alcohols at unrivalled reaction rates reaching TOFs up to 550 000 h(-1), at low catalyst loadings (S/C higher than 10 000) and using acetone in stoichiometric amounts. Complex 3 is also highly active in the reverse transfer hydrogenation of several ketones with 2-propanol, displaying TOFs up to 600 000 h(-1).

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页码：11302 / 11306

页数：9

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