Stereoselective total synthesis of the putative structure of nitraraine

After the structure originally proposed for nitraraine was shown to be incorrect by total synthesis, the alternative structure 5 was recently suggested for the alkaloid on biosynthetic grounds and by comparison with the (1)H NMR data of tangutorine. The unambiguous synthesis of 5 is reported from tr...

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Detalhes bibliográficos
Autores: Arioli, Federica, Pérez Bosch, Maria, Subrizi, Fabiana, Llor Brunés, Núria, Bosch Cartes, Joan, Amat Tusón, Mercedes
Formato: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2014
País:España
Recursos:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
Repositorio:Recercat. Dipósit de la Recerca de Catalunya
OAI Identifier:oai:recercat.cat:2445/99223
Acesso em linha:https://hdl.handle.net/2445/99223
Access Level:acceso abierto
Palavra-chave:Alcaloides
Síntesi orgànica
Lactames
Compostos heterocíclics
Triptòfan
Alkaloids
Organic synthesis
Lactams
Heterocyclic compounds
Tryptophan
Descrição
Resumo:After the structure originally proposed for nitraraine was shown to be incorrect by total synthesis, the alternative structure 5 was recently suggested for the alkaloid on biosynthetic grounds and by comparison with the (1)H NMR data of tangutorine. The unambiguous synthesis of 5 is reported from tryptophanol and ketodiester 6, via oxazoloquinolone lactam 7. However, the melting point and (1)H NMR data of 5 did not match those reported for the natural product.