Palladium(0) pre‐catalysts with heteroditopic NHC–amine ligands by transmetallation from their silver(I) complexes |
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| Authors: | Stefan Warsink Peter Hauwert Maxime A. Siegler Anthony L. Spek Cornelis J. Elsevier |
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| Affiliation: | 1. van ‘t Hoff Institute for Molecular Sciences, University of Amsterdam, Nieuwe Achtergracht 166, 1018 WV Amsterdam, The Netherlands;2. Bijvoet Center for Biomolecular Research, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands |
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| Abstract: | The synthesis of an air‐stable series of Pd0 complexes with dissymmetric bidentate N‐heterocyclic carbene–amine ligands has been performed. The key step is an unprecedented carbene transfer from AgI to obtain electron‐rich zero‐valent palladium precatalysts. The coordination behavior of the ligands was determined with X‐ray crystallography. Surprising results were obtained in the catalysis of transfer semi‐hydrogenation, where the addition of base appeared not to be necessary to obtain the desired product stereoselectively. Copyright © 2009 John Wiley & Sons, Ltd. |
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| Keywords: | carbene complexes organometallic compounds palladium silver transmetallation |
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