Engineering and Performance of Ruthenium Complexes Immobilized on Mesoporous Siliceous Materials as Racemization Catalysts
| Autor: | Andrzej B. Jarzębski, Monika Heba, Anna Kolanowska, Krzysztof Ambroziak, Monika Masternak, Nikodem Kuźnik, Wojciech Pudło, Katarzyna Szymańska, Dominika Stradomska |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
chiral secondary alcohols
010405 organic chemistry Chemistry Enantioselective synthesis chemistry.chemical_element Mesoporous silica 010402 general chemistry lcsh:Chemical technology 01 natural sciences Catalysis 0104 chemical sciences Kinetic resolution Ruthenium lcsh:Chemistry Cyclopentadienyl complex lcsh:QD1-999 resolution of enantiomers Polymer chemistry racemization ruthenium complexes lcsh:TP1-1185 Physical and Theoretical Chemistry Mesoporous material Racemization |
| Zdroj: | Catalysts, Vol 11, Iss 316, p 316 (2021) Catalysts Volume 11 Issue 3 |
| ISSN: | 2073-4344 |
| Popis: | Dynamic kinetic resolution (DKR) is one of the most attractive routes to enantioselective synthesis, and ruthenium complexes are often applied as racemization catalysts. Two substituted cyclopentadienyl ruthenium complexes were immobilized covalently and non-covalently on mesoporous silica of mesocellular foam (MCF) and Santa Barbara Amorphous (SBA)-15 type functionalized with a 3 carbon spacer and 4-(chloromethyl)-N-amidobenzoate moiety. The catalysts were studied in a model reaction of secondary alcohol racemization. The immobilization decreased catalyst activity, considerably more for SBA-15 than for MCFs, and complete racemization of 1-phenylethanol was achieved within 24 h with the MCF-supported catalyst. The catalyst could be recovered and reused, thus paving the way for further development of the DKR process. The synthesized materials were fully characterized by Fourier-transform infrared spectroscopy analysis, thermogravimetry analysis, inductively cou-pled plasma optical emission spectrometry, and nitrogen adsorption at 77 K. |
| Databáze: | OpenAIRE |
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