Imidazolium-Based Polymer Supported Gadolinium Triflate as a Heterogeneous Recyclable Lewis Acid Catalyst for Michael Additions
A heterogeneous Lewis acid catalytic system has been developed by incorporating gadolinium triflate on to poly[styrene-co-(1-((4-vinylphenyl)methyl)-3-methylimidazolium) tetrafluoroborate] (1-Gd(OTf)3), and the catalytic activity of this system has been examined for Michael additions of amines and thiols to α,ß-unsaturated esters and acrylonitrile. The reactions proceed in moderate to excellent yields in the presence of catalytic system 1-Gd(OTf)3. The catalytic system could be efficiently recycled and reused.
R. Alleti et al., "Imidazolium-Based Polymer Supported Gadolinium Triflate as a Heterogeneous Recyclable Lewis Acid Catalyst for Michael Additions," Tetrahedron Letters, vol. 49, no. 21, pp. 3466-3470, Elsevier, May 2008.
The definitive version is available at http://dx.doi.org/10.1016/j.tetlet.2008.03.108
Petroleum Research Fund
Keywords and Phrases
acrylonitrile; amine; boric acid; ester derivative; gadolinium trifluoromethanesulfonic acid; imidazole derivative; Lewis acid; poly[styrene co [1 [(4 vinylphenyl)methyl] 3 methylimidazolium]tetrafluoroborate]; polymer; thiol derivative; trifluoromethanesulfonic acid; catalysis; chemical reaction; chemical structure; gas chromatography; mass spectrometry; Michael addition
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Article - Journal
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