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Article

CpCo(III) Precatalysts for [2+2+2] Cycloadditions

1
Leibniz-Institut für Katalyse e.V. (LIKAT), Albert-Einstein-Strasse 29a, D-18059 Rostock, Germany
2
Institut für Katalyse (INCA), Johannes Kepler Universität Linz, Altenberger Strasse 69, A-4040 Linz, Austria
*
Author to whom correspondence should be addressed.
Academic Editors: Jose R. Cabrero-Antonino and Rosa Adam
Catalysts 2021, 11(5), 596; https://doi.org/10.3390/catal11050596
Received: 12 April 2021 / Revised: 30 April 2021 / Accepted: 2 May 2021 / Published: 4 May 2021
(This article belongs to the Special Issue Cobalt Catalysis: Recent Progress and Developments)
Catalysts applied in cobalt-catalyzed cyclotrimerizations reactions in general rely on the use of Co(I) precatalysts or the in situ generation of Co(I) catalysts from Co(II) sources by reduction in the presence of steering ligands, often by addition of less noble metals. In this paper, we report the synthesis and properties of novel stable CpCo(III) complexes as precatalysts and their exemplary evaluation for application in catalytic [2+2+2] cycloadditions. The role of phosphite neutral ligands, as well as iodide and cyanide as anionic ligands, on the reactivity of the complexes was evaluated. A modified one-pot approach to the synthesis of Cp ring-functionalized Cp’Co(III) complexes was developed. The investigations demonstrated that CpCo(III) complexes can be directly applied as catalysts in catalytic cyclotrimerizations of triynes without reducing agents as additives. View Full-Text
Keywords: cobalt(III) complexes; complex synthesis; [2+2+2] cycloaddition reactions; cyclopentadienyl ligand; olefins; phosphites cobalt(III) complexes; complex synthesis; [2+2+2] cycloaddition reactions; cyclopentadienyl ligand; olefins; phosphites
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MDPI and ACS Style

Fischer, F.; Eder, M.; Hapke, M. CpCo(III) Precatalysts for [2+2+2] Cycloadditions. Catalysts 2021, 11, 596. https://doi.org/10.3390/catal11050596

AMA Style

Fischer F, Eder M, Hapke M. CpCo(III) Precatalysts for [2+2+2] Cycloadditions. Catalysts. 2021; 11(5):596. https://doi.org/10.3390/catal11050596

Chicago/Turabian Style

Fischer, Fabian, Michael Eder, and Marko Hapke. 2021. "CpCo(III) Precatalysts for [2+2+2] Cycloadditions" Catalysts 11, no. 5: 596. https://doi.org/10.3390/catal11050596

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