Grubbs–Hoveyda type catalysts bearing a dicationic N-heterocyclic carbene for biphasic olefin metathesis reactions in ionic liquids

The novel dicationic metathesis catalyst [(RuCl(2)(H(2)ITapMe(2))(=CH–2-(2-PrO)-C(6)H(4)))(2+) (OTf(−))(2)] (Ru-2, H(2)ITapMe(2) = 1,3-bis(2’,6’-dimethyl-4’-trimethylammoniumphenyl)-4,5-dihydroimidazol-2-ylidene, OTf(−) = CF(3)SO(3)(−)) based on a dicationic N-heterocyclic carbene (NHC) ligand was p...

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Detalles Bibliográficos
Autores principales: Koy, Maximilian, Altmann, Hagen J, Autenrieth, Benjamin, Frey, Wolfgang, Buchmeiser, Michael R
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Beilstein-Institut 2015
Materias:
Full Research Paper
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4660883/
https://www.ncbi.nlm.nih.gov/pubmed/26664582
http://dx.doi.org/10.3762/bjoc.11.178
Descripción
Sumario:The novel dicationic metathesis catalyst [(RuCl(2)(H(2)ITapMe(2))(=CH–2-(2-PrO)-C(6)H(4)))(2+) (OTf(−))(2)] (Ru-2, H(2)ITapMe(2) = 1,3-bis(2’,6’-dimethyl-4’-trimethylammoniumphenyl)-4,5-dihydroimidazol-2-ylidene, OTf(−) = CF(3)SO(3)(−)) based on a dicationic N-heterocyclic carbene (NHC) ligand was prepared. The reactivity was tested in ring opening metathesis polymerization (ROMP) under biphasic conditions using a nonpolar organic solvent (toluene) and the ionic liquid (IL) 1-butyl-2,3-dimethylimidazolium tetrafluoroborate [BDMIM(+)][BF(4)(−)]. The structure of Ru-2 was confirmed by single crystal X-ray analysis.

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