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Polyelectrolyte-catalyzed Diels–Alder reactions
Pothanagandhi N, , Vijayakrishna K.
Published in Elsevier BV
Volume: 106
Pages: 132 - 136
Imidazolium-based poly(ionic liquids) bearing bromide and bis(trifluoromethane)sulfonimide as counteranions [poly(ViEIm)Br and poly(ViEIm)NTf2] derived from reversible addition fragmentation chain transfer (RAFT) polymerization techniques are used in polymer-assisted solution phase Diels–Alder reactions between isoprene and a variety of dienophiles. With 5 mol% loading, these polyelectrolytes exhibit very good catalytic activity toward Diels–Alder reaction with quantitative yields within 30 min at room temperature. These polyelectrolyte-catalyzed reactions resulted in good para/meta-like product ratios. Here, the coordination nature of the positively charged imidazolium groups in polyelectrolyte with dienophiles plays a key role in catalyst activity and selectivity. These polyelectrolytes were reused for 4 cycles without a significant loss in their catalytic activity and selectivity. © 2016
About the journal
JournalData powered by TypesetReactive and Functional Polymers
PublisherData powered by TypesetElsevier BV
Open Access0