Bisoxazoline-pincer ligated cobalt-catalyzed hydrogenation of alkenes
作者:Mikhaila D. Ritz、Astrid M. Parsons、Philip N. Palermo、William D. Jones
DOI:10.1016/j.poly.2020.114416
日期:2020.4
The efficient and atom economical hydrogenation of alkenes using a novel bisoxazoline ligated cobalt complex has been developed. The hydrogenation of a variety of alkenes containing electron neutral and electron-donating groups proceeds in high yield, while electron-withdrawing and sterically hindered groups are not tolerated. Heterocycles and internal alkenes were also hydrogenated in moderate to high yields. While the catalyst is enantiopure, no enantioinduction was observed suggesting that other factors are involved in achieving enantiocontrol. (C) 2020 Elsevier Ltd. All rights reserved.
Intermolecular Dehydrative Coupling Reaction of Aryl Ketones with Cyclic Alkenes Catalyzed by a Well-Defined Cationic Ruthenium−Hydride Complex: A Novel Ketone Olefination Method via Vinyl C−H Bond Activation
作者:Chae S. Yi、Do W. Lee
DOI:10.1021/om100051h
日期:2010.4.26
The cationic ruthenium hydride complex[(eta(6)-C(6)H(6))-(PCy(3))(CO)RuH](+)BF(4)(-) was found to be a highly effective catalyst for the intermolecular olefination reaction of aryl ketones with cycloalkenes. The preliminary mechanistic analysis revealed that an electrophilic ruthenium vinyl complex is the key species fir mediating both vinyl C-H bond activation and the dehydrative olefination steps of the coupling reaction.