Lutidine-derived Ru-CNC hydrogenation pincer catalysts with versatile coordination properties
| Autor: | Filonenko, Georgy A., Cosimi, Elena, Lefort, Laurent, Conley, Matthew P., Copéret, Christophe, Lutz, Martin, Hensen, Emiel J M, Pidko, Evgeny A., Sub Crystal and Structural Chemistry, Crystal and Structural Chemistry |
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| Přispěvatelé: | Sub Crystal and Structural Chemistry, Crystal and Structural Chemistry, Inorganic Materials & Catalysis |
| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: |
Nitrile
Noyori asymmetric hydrogenation chemistry.chemical_element General Chemistry Catalysis nitrile activation Ruthenium chemistry.chemical_compound metal-ligand cooperation chemistry Polymer chemistry Organic chemistry Formate Reactivity (chemistry) hydrogenation ruthenium N-heterocyclic carbene Carbene Phosphazene |
| Zdroj: | ACS Catalysis, 4(8), 2667. American Chemical Society ACS Catalysis, 4(8), 2667-2671. American Chemical Society |
| ISSN: | 2155-5435 |
| DOI: | 10.1021/cs500720y |
| Popis: | Lutidine-derived bis-N-heterocyclic carbene (NHC) ruthenium CNC–pincer complexes (Ru-CNCs) were prepared. They showed various coordination modes of the two NHC ligands depending on the synthetic procedure, yielding normal (1, 2) or mixed normal/abnormal NHC-complexes (3). In the presence of phosphazene base, Ru-CNC complexes activate nitriles to give ketimino compounds 4-6. Nitrile adduct 4 shows reactivity towards strong bases to yield dearomatized complex 7, that heterolytically activate H2 to form the bis-hydrido complex 8. Finally, these Ru-CNCs are active in catalytic hydrogenation of CO2 to formate salts and, unlike the phosphine-containing Ru-PNP counterpart, they also catalyze the selective hydrogenation of esters to alcohols. |
| Databáze: | OpenAIRE |
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