Ru complexes of Hoveyda–Grubbs type immobilized on lamellar zeolites: activity in olefin metathesis reactions

0450858 - ÚFCH JH 2016 RIV DE eng J - Článek v odborném periodiku
Balcar, Hynek - Žilková, Naděžda - Kubů, Martin - Mazur, Michal - Bastl, Zdeněk - Čejka, Jiří
Ru complexes of Hoveyda–Grubbs type immobilized on lamellar zeolites: activity in olefin metathesis reactions.
Beilstein Journal of Organic Chemistry. Roč. 11, NOV 2015 (2015), s. 2087-2096. ISSN 1860-5397. E-ISSN 1860-5397
Institucionální podpora: RVO:61388955
Klíčová slova: Hoveyda-Grubbs type catalyst * hybrid catalysts * lamellar zeolites
Kód oboru RIV: CF - Fyzikální chemie a teoretická chemie
Impakt faktor: 2.697, rok: 2015

Hoveyda–Grubbs type catalysts with cationic tags on NHC ligands were linker-free immobilized on the surface of lamellar zeolitic supports (MCM-22, MCM-56, MCM-36) and on mesoporous molecular sieves SBA-15. The activity of prepared hybrid catalysts was tested in olefin metathesis reactions: the activity in ring-closing metathesis of citronellene and N,N-diallyltrifluoroacetamide decreased in the order of support MCM-22 ≈ MCM-56 > SBA-15 > MCM-36; the hybrid catalyst based on SBA-15 was found the most active in self-metathesis of methyl oleate. All catalysts were reusable and exhibited low Ru leaching (<1% of Ru content). XPS analysis revealed that during immobilization ion exchange between Hoveyda–Grubbs type catalyst and zeolitic support occurred in the case of Cl− counter anion; in contrast, PF6 − counter anion underwent partial decomposition.
Trvalý link: http://hdl.handle.net/11104/0252057