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

被引：21

作者：

Balcar, Hynek ^{[1
]}

Zilkova, Nadezda ^{[1
]}

Kubu, Martin ^{[1
]}

Mazur, Michal ^{[1
]}

Bastl, Zdenek ^{[1
]}

Cejka, Jiri ^{[1
]}

机构：

[1] Acad Sci Czech Republ, Vvi Dolejskova 2155 3, J Heyrovsky Inst Phys Chem, CR-18223 Prague 8, Czech Republic

来源：

BEILSTEIN JOURNAL OF ORGANIC CHEMISTRY | 2015年 / 11卷

关键词：

Hoveyda-Grubbs type catalyst; hybrid catalysts; lamellar zeolites; non-covalent immobilization; olefin metathesis; MESOPOROUS MOLECULAR-SIEVES; RUTHENIUM CARBENES; CATALYSTS; SILICA; STRATEGIES;

D O I：

10.3762/bjoc.11.225

中图分类号：

O62 [有机化学];

学科分类号：

070303 ; 081704 ;

摘要：

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 approximate to 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.

引用

页码：2087 / 2096

页数：10

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