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.
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收藏
页码：4362 / 4365
页数：4
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