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Novel imidazolium ion-tagged Ru-carbene complexes: synthesis and applications for olefin metathesis in ionic liquid

Title
Novel imidazolium ion-tagged Ru-carbene complexes: synthesis and applications for olefin metathesis in ionic liquid
Authors
Chen S.-W.Kim J.H.Ryu K.Y.Lee W.-W.Hong J.Lee S.-g.
Ewha Authors
이상기김주현
SCOPUS Author ID
이상기scopus
Issue Date
2009
Journal Title
Tetrahedron
ISSN
0040-4020JCR Link
Citation
vol. 65, no. 17, pp. 3397 - 3403
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
Novel Hoveyda-type Ru-carbene complexes 7a,b and 8a,b tethering imidazolium tags at chelating isopropoxy group have been synthesized, and investigated their catalytic activities and recyclabilities in ring-closing metathesis (RCM) and cross metathesis (CM) in ionic liquids. They showed excellent catalytic activities for RCM of various dienes in [bmim][PF6]/CH2Cl2 (1/1, v/v). The recyclability of these catalysts is largely dependent on the tether length and the structures of imidazolium tag and ionic liquid, as well as the composition of the ionic solvent system. A combination of the 2-methylated imidazolium ion-tagged Ru-complex 7b with a mixture of [bdmim][PF6]/toluene (1/3, v/v) allowed several times recycling without significant loss of catalytic activity in RCM, however low recyclabilities were observed in CMs. © 2009 Elsevier Ltd. All rights reserved.
DOI
10.1016/j.tet.2009.02.043
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자연과학대학 > 화학·나노과학전공 > Journal papers
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