Synthesis and electrochemical evaluation of substituted imidazo[4,5-d]pyrrolo [3,2-f][1,3] diazepine scaffolds
In: Tetrahedron (Oxford. Print), Jg. 68 (2012), Heft 24
academicJournal
- print,
Zugriff:
Substituted 4-(2,5-dihydro-1H-pyrrol-3-yl)-1H-imidazoles were prepared from 5-amino-1-aryl-4-cyanoformimidoylimidazoles and cyanoacetamide, under mild experimental conditions. The pyrrolyl-imidazoles were cyclized to the corresponding 7,8-dihydroimidazo[4,5-b]pyrrolo[3,4-d]pyridines by reflux in ethanol, with catalysis by DBU. The same pyrrolyl-imidazoles were reacted with orthoesters, at room temperature and in the presence of sulfuric acid, to generate 3,7-dihydro-8H-imidazo[4,5-d]pyrrolo[3,2-f]diazepines in very good yield. Electrochemical studies of the imidazo[4,5-d]pyrro]o[3,2-1][1,3] diazepine derivatives were carried out. The reduction potential of 7-ethyl-3-(4-methoxyphenyl)-8-oxo-7,8-dihydro-3H-imidazo[4,5-d]pyrrolo[3,2-][1,3] diazepine-9-carbonitrile was in the adequate range for presenting bioreduction properties.
Titel: |
Synthesis and electrochemical evaluation of substituted imidazo[4,5-d]pyrrolo [3,2-f][1,3] diazepine scaffolds
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Autor/in / Beteiligte Person: | ZAKI, Magdi E. A ; BETTENCOURT, A. Paula ; FERNANDES, Francisco M ; FERNANDA PROENCA, M |
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Zeitschrift: | Tetrahedron (Oxford. Print), Jg. 68 (2012), Heft 24 |
Veröffentlichung: | Kidlington: Elsevier, 2012 |
Medientyp: | academicJournal |
Umfang: | print, |
ISSN: | 0040-4020 (print) |
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