Hoveyda–Grubbs first generation type catalyst immobilized on mesoporous molecular sieves

0394303 - ÚFCH JH 2014 RIV NL eng J - Článek v odborném periodiku
Pastva, Jakub - Čejka, Jiří - Žilková, Naděžda - Mestek, O. - Rangus, M. - Balcar, Hynek
Hoveyda–Grubbs first generation type catalyst immobilized on mesoporous molecular sieves.
Journal of Molecular Catalysis A-Chemical. Roč. 378, NOV 2013 (2013), s. 184-192. ISSN 1381-1169
Grant CEP: GA AV ČR IAA400400805
Institucionální podpora: RVO:61388955
Klíčová slova: Hoveyda–Grubbs type catalysts * Olefin metathesis * Mesoporous molecular sieves
Kód oboru RIV: CF - Fyzikální chemie a teoretická chemie
Impakt faktor: 3.679, rok: 2013

New heterogeneous, reusable catalysts for olefin metathesis have been prepared by immobilizing the Hoveyda–Grubbs first generation type alkylidene (commercially available as the Zhan catalyst-1C) on siliceous mesoporous molecular sieves with different pore sizes and architectures (SBA-15, SBA-16, MCM-41 and MCM-48) having the surface modified with molecules bearing dicyclohexylphosphine (PCy2) end groups. Resulting novel heterogenized catalysts proved high activity in ring-closing metathesis (RCM) of 1,7-octadiene, diethyl diallylmalonate, tert-butyl N,N-diallylcarbamate and N,N-diallyl-2,2,2-trifluoroacetamide, in homometathesis of 1-decene, 5-hexenyl acetate and methyl 10-undecenoate, and in cross-metathesis (CM) of allylbenzene with cis-1,4-diacetoxy-2-butene. The catalytic activity decreased with decreasing pore size of supports in the order SBA-15 > MCM-48 > SBA-16 and MCM-41. Filtration test suggested that the solid catalyst was responsible for the catalytic activity. Catalysts were easily separated from the reaction mixtures and products of low levels of Ru concentration were obtained.
Trvalý link: http://hdl.handle.net/11104/0222576