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TitleCatalytic cyclization of propargyl bromoethers via electrogenerated nickel(I) tetramethylcyclam in Ionic liquids: water effects
Author(s)Mendes, Jorge António Silva
Duñach, E.
Esperanca, J. M. S. S.
Medeiros, Maria José
Ribeiro, J. F.
Silva, Maria Manuela
Olivero, S.
KeywordsRoom temperature ionic liquids
Intramolecular cyclization
Nickel(I) tetramethylcyclam
Bromopropargyloxy ester
Issue date8-Apr-2019
PublisherElectrochemical Society
JournalJournal of the Electrochemical Society
Abstract(s)Cyclic voltammetry and controlled-potential electrolysis have been employed to investigate the reductive intramolecular cyclization of propargyl bromoethers derivatives, catalyzed by electrogenerated (1,4,8,11-tetramethyl-1,4,8,11-tetraaza-cyclotetradecane) nickel(I), [Ni(tmc)](+), as the catalyst, in N,N,N-trimethyl-N-(2-hydroxyethyl) ammonium bis(trifluoromethylsulfonyl) imide, [N-1 1 1 2(OH)][NTf2] and 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl) imide, [C(2)mim][NTf2] in the absence and in the presence of water. The results show that the reaction leads to the formation of the expected heterocyclic compounds, in moderate to good yields. These compounds are important intermediates in the synthesis of natural products with possible biological activities.
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AccessRestricted access (UMinho)
Appears in Collections:CDQuim - Artigos (Papers)

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