Sandl, Sebastian and Schwarzhuber, Felix and Poellath, Simon and Zweck, Josef and Jacobi von Wangelin, Axel (2018) Olefin-Stabilized Cobalt Nanoparticles for C=C, C=O, and C=N Hydrogenations. CHEMISTRY-A EUROPEAN JOURNAL, 24 (14). pp. 3403-3407. ISSN 0947-6539, 1521-3765
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The development of cobalt catalysts that combine easy accessibility and high selectivity constitutes a promising approach to the replacement of noble-metal catalysts in hydrogenation reactions. This report introduces a user-friendly protocol that avoids complex ligands, hazardous reductants, special reaction conditions, and the formation of highly unstable pre-catalysts. Reduction of CoBr2 with LiEt3BH in the presence of alkenes led to the formation of hydrogenation catalysts that effected clean conversions of alkenes, carbonyls, imines, and heteroarenes at mild conditions (3 mol% cat., 2-10 bar H-2, 20-80 degrees C). Poisoning studies and nanoparticle characterization by TEM, EDX, and DLS supported the notion of a heterotopic catalysis mechanism.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | LITHIUM ALUMINUM-HYDRIDE; CROSS-COUPLING REACTIONS; SELECTIVE HYDROGENATION; CATALYZED HYDROGENATION; PALLADIUM(0) COMPLEXES; EXCEPTIONALLY POWERFUL; VINYL HALIDES; METALS; MILD; ARYL; cobalt; hydrogenations; imines; ketones; nanoparticles |
| Subjects: | 500 Science > 530 Physics 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Physics > Institute of Experimental and Applied Physics > Chair Professor Back > Group Josef Zweck Chemistry and Pharmacy > Institut für Organische Chemie > Arbeitskreis Prof. Dr. Axel Jacobi von Wangelin |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 20 Mar 2020 10:21 |
| Last Modified: | 20 Mar 2020 10:21 |
| URI: | https://pred.uni-regensburg.de/id/eprint/14904 |
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