Osmium(II) CNN pincer complexes as efficient catalysts for both asymmetric transfer and H2 hydrogenation of ketones

被引：123

作者：

Baratta, Walter ^{[1
]}

Ballico, Maurizio ^{[1
]}

Chelucci, Giorgio ^{[2
]}

Siega, Katia ^{[1
]}

Rigo, Pierluigi ^{[1
]}

机构：

[1] Univ Udine, Dipartimento Sci & Technol Chim, I-33100 Udine, Italy

[2] Univ Sassari, Dipartimento Chim, I-07100 Sassari, Italy

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2008年 / 47卷 / 23期

关键词：

asymmetric catalysis; hydrides; hydrogen transfer; hydrogenation; osmium;

D O I：

10.1002/anie.200800339

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Catalysis at a pinch: Osmium CNN pincer complexes [OsCl(CNN)P2] (see graphic) are extremely active and productive catalysts for both the transfer and asymmetric hydrogenation of ketones (TOF ≈ 106 h -1 and TON ≈105). High enantioselectivity is achieved in the presence of only 0.005-0.002 mol% of the chiral osmium derivatives. [OsX(CNN)(dppb)] species with X = H and OR are involved in these catalytic TH and HY reactions. (Chemical Equation Presented) © 2008 Wiley-VCH Verlag GmbH & Co. KGaA.

引用

页码：4362 / 4365

页数：4

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