Electrochemical intramolecular cyclisation of propargyl bromoethers catalysed by nickel complexes
The electrochemical intramolecular cyclisation of propargyl 2-bromoethers 1-3 in N,N'-dimethylformamide at constant current in a diaphragmless cell has been developed using Ni(II) complexes as electron-transfer mediators. During controlled-current electrolyses of solutions of Ni(II) complexes i...
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| Outros Autores: | , , |
| Formato: | article |
| Idioma: | eng |
| Publicado em: |
2005
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| Assuntos: | |
| Texto completo: | http://hdl.handle.net/1822/3063 |
| País: | Portugal |
| Oai: | oai:repositorium.sdum.uminho.pt:1822/3063 |
| Resumo: | The electrochemical intramolecular cyclisation of propargyl 2-bromoethers 1-3 in N,N'-dimethylformamide at constant current in a diaphragmless cell has been developed using Ni(II) complexes as electron-transfer mediators. During controlled-current electrolyses of solutions of Ni(II) complexes in the presence of bromoethers, catalytic reduction of the latter proceeds via one-electron cleavage of the carbon–bromine bond to form a radical intermediate that undergoes cyclisation to afford the cyclic compounds in moderated to good yields. |
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