?6-mesityl,?1-imidazolinylidene-carbene- ruthenium(II) complexes: Catalytic activity of their allenylidene derivatives in alkene metathesis and cycloisomerisation reactions
dc.contributor.author | Çetinkaya B. | |
dc.contributor.author | Demir S. | |
dc.contributor.author | Özdemir I. | |
dc.contributor.author | Toupet L. | |
dc.contributor.author | Sémeril D. | |
dc.contributor.author | Bruneau C. | |
dc.contributor.author | Dixneuf P.H. | |
dc.date.accessioned | 2019-10-27T08:59:42Z | |
dc.date.available | 2019-10-27T08:59:42Z | |
dc.date.issued | 2003 | |
dc.department | Ege Üniversitesi | en_US |
dc.description.abstract | The reaction of electron-rich carbene-precursor olefins containing two imidazolinylidene moieties [(2,4,6- Me3C6H2CH2)NCH2 CH2N(R)C=]2 (2a: R = CH2CH2OMe, 2b R = CH2Mes), bearing at least one 2,4,6-trimethylbenzyl (R = CH2Mes) group on the nitrogen atom, with [RuCl2(arene)]2 (arene = p-cymene, hexamethylbenzene) selectively leads to two types of complexes. The cleavage of the chloride bridges occurs first to yield the expected (carbene) (arene)ruthenium(II) complex 3. Then a further arene displacement reaction takes place to give the chelated ?6-mesityl,?1-carbene - ruthenium complexes 4 and 5. An analogous ?6-a- rene,?1-carbene complex with a benzimidazole frame 6 was isolated from an in situ reaction between [RuCl2(p-cymene)]2, the corresponding benzimidazolium salt and cesium carbonate. On heating, the RuCl2(imidazolinylidene) (p-cymene) complex 8, with p-methoxybenzyl pendent groups attached to the N atoms, leads to intramolecular p-cymene displacement and to the chelated ?6-arene,?1-carbene complex 9. On reaction with AgOTf and the propargylic alcohol HC?CCPh2OH, compounds 4-6 were transformed into the corresponding ruthenium allenylidene intermediates (4 › 10, 5 › 11, 6 › 12). The in situ generated intermediates 10-12 were found to be active and selective catalysts for ring-closing metathesis (RCM) or cycloisomerisation reactions depending on the nature of the 1,6-dienes. Two complexes [RuCl2- [?1CN(CH2C6H2 Me3-2,4,6)CH2CH2N- (CH2CH2OMe)}(C6Me6)] 3 with a monodentate carbene ligand and [RuCl2{?1- CN[CH2(?6-C6H2 Me3-2,4,6)]CH2CH2N- (CH2C6H2Me3-2,4,6)}] 5 with a chelating carbene-arene ligand were characterised by X-ray crystallography. | en_US |
dc.identifier.doi | 10.1002/chem.200204533 | |
dc.identifier.endpage | 2330 | en_US |
dc.identifier.issn | 0947-6539 | |
dc.identifier.issn | 0947-6539 | en_US |
dc.identifier.issue | 10 | en_US |
dc.identifier.scopusquality | Q1 | en_US |
dc.identifier.startpage | 2323 | en_US |
dc.identifier.uri | https://doi.org/10.1002/chem.200204533 | |
dc.identifier.uri | https://hdl.handle.net/11454/27883 | |
dc.identifier.volume | 9 | en_US |
dc.indekslendigikaynak | Scopus | en_US |
dc.language.iso | en | en_US |
dc.relation.ispartof | Chemistry - A European Journal | en_US |
dc.relation.publicationcategory | Makale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı | en_US |
dc.rights | info:eu-repo/semantics/closedAccess | en_US |
dc.subject | Alkene metathesis | en_US |
dc.subject | Arenes | en_US |
dc.subject | Carbenes | en_US |
dc.subject | Catalysis | en_US |
dc.subject | Cycloisomerisation | en_US |
dc.subject | Ruthenium | en_US |
dc.title | ?6-mesityl,?1-imidazolinylidene-carbene- ruthenium(II) complexes: Catalytic activity of their allenylidene derivatives in alkene metathesis and cycloisomerisation reactions | en_US |
dc.type | Article | en_US |