Abstract
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,β-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.
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