Hoveyda-Grubbs type metathesis catalyst immobilized on mesoporous molecular sieves MCM-41 and SBA-15
Status PubMed-not-MEDLINE Jazyk angličtina Země Německo Médium electronic
Typ dokumentu časopisecké články
PubMed
21286390
PubMed Central
PMC3028926
DOI
10.3762/bjoc.7.4
Knihovny.cz E-zdroje
- Klíčová slova
- Ru–alkylidene complexes, alkene metathesis, catalyst immobilization, hybrid catalysts, mesoporous molecular sieves,
- Publikační typ
- časopisecké články MeSH
A commercially available Hoveyda-Grubbs type catalyst (RC303 Zhannan Pharma) was immobilized on mesoporous molecular sieves MCM-41 and on SBA-15 by direct interaction with the sieve wall surface. The immobilized catalysts exhibited high activity and nearly 100% selectivity in several types of alkene metathesis reactions. Ru leaching was found to depend on the substrate and solvent used (the lowest leaching was found for ring-closing metathesis of 1,7-octadiene in cyclohexane - 0.04% of catalyst Ru content). Results of XPS, UV-vis and NMR spectroscopy showed that at least 76% of the Ru content was bound to the support surface non-covalently and could be removed from the catalyst by washing with THF.
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