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Open AccessArticle

Transmetalation from Magnesium–NHCs—Convenient Synthesis of Chelating π-Acidic NHC Complexes

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Lehrstuhl für Anorganische und Allgemeine Chemie, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstr. 1, 91058 Erlangen, Germany
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Lehrstuhl für Anorganische und Metallorganische Chemie, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstr. 1, 91058 Erlangen, Germany
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Lehrstuhl für Bioanorganische Chemie, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstr. 1, 91058 Erlangen, Germany
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Author to whom correspondence should be addressed.
Inorganics 2019, 7(5), 65; https://doi.org/10.3390/inorganics7050065
Received: 6 May 2019 / Revised: 18 May 2019 / Accepted: 19 May 2019 / Published: 22 May 2019
(This article belongs to the Section Organometallic Chemistry)
The synthesis of chelating N-heterocyclic carbene (NHC) complexes with considerable π-acceptor properties can be a challenging task. This is due to the dimerization of free carbene ligands, the moisture sensitivity of reaction intermediates or reagents, and challenges associated with the workup procedure. Herein, we report a general route using transmetalation from magnesium–NHCs. Notably, this route gives access to transition-metal complexes in quantitative conversion without the formation of byproducts. It therefore produces transition-metal complexes outperforming the conventional routes based on free or lithium-coordinated carbene, silver complexes, or in situ metalation in dimethyl sulfoxide (DMSO). We therefore propose transmetalation from magnesium–NHCs as a convenient and general route to obtain NHC complexes. View Full-Text
Keywords: NHC; transmetalation; magnesium; palladium; carbene NHC; transmetalation; magnesium; palladium; carbene
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MDPI and ACS Style

Messelberger, J.; Grünwald, A.; Stegner, P.; Senft, L.; Heinemann, F.W.; Munz, D. Transmetalation from Magnesium–NHCs—Convenient Synthesis of Chelating π-Acidic NHC Complexes. Inorganics 2019, 7, 65.

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