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Reductive intramolecular cyclization of D-glucose-based unsaturated substrates ...
Dias, T. A.; Durães, C.; Esteves, Ana Paula; Medeiros, Maria José; Pletcher, D.Radical cyclisation continues to be a central methodology for the preparation of natural products containing heterocyclic rings. Hence, some electrochemical results obtained by cyclic voltammetry and controlled-potential electrolysis in the study of electroreductive intramolecular cyclisation of ethyl (2S, 3R)-2- bromo-3-propargyloxy-3-(2’,3’,4’,6’-tetra-O-acetyl-β-D-glucopyranosiloxy) propanoate (1) promoted b...
Organic cyclisations of propargyl and allyl bromoesters in microemulsions catal...
Esteves, Ana Paula; Neves, C. S. S.; Medeiros, Maria José; Pletcher, D.While the reductive intramolecular cyclisation of propargyl and allyl bromoesters catalysed by [Ni(tmc)]+ gives good yields of the desired products using N,N-dimethylformamide as the solvent, the use of this aprotic solvent presents practical, safety and environmental issues. This paper therefore reports the search for non-toxic alternatives, in particular the study of microemulsions prepared from water, hydroc...
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