Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/13442
Título: | Electroreductive intramolecular cyclization of bromoalkoxylated derivatives catalyzed by nickel(I) tetramethylcyclam in "green" media |
Autor(es): | Medeiros, M. J. Neves, C. S. S. Pereira, A. R. Duñach, E. |
Palavras-chave: | Microemulsions Electrosynthesis Catalytic reduction Intramolecular cyclisation Nickel(II) complex |
Data: | 24-Fev-2011 |
Editora: | Elsevier 1 |
Revista: | Electrochimica Acta |
Resumo(s): | The (1,4,8,11-tetramethyl-1,4,8,11-tetraazacyclotetra-decane)nickel(I), [Ni(tmc)]+, electrogenerated at glassy carbon cathodes is shown to be an effective catalyst for the intramolecular radical-type cyclisation of bromoalkoxylated derivatives 1 in alcohol and / or alcohol/water mixtures as well as in microemulsions made with cationic and anionic surfactants. The results obtained indicate that the reaction proceeds via cleavage of the carbon–bromine bond to form a radicaltype intermediate that undergoes cyclisation on the unsaturated C-C bond to afford substituted tetrahydrofurans. The reactions are more selective and take place at higher current density than when carried out in conventional aprotic solvents. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/13442 |
ISSN: | 0013-4686 |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: | CDQuim - Artigos (Papers) |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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MJM- Paper-Revised version-final.pdf | Documento principal | 440,48 kB | Adobe PDF | Ver/Abrir |