New syntheses of the Amaryllidacaea alkaloids vasconine, assoanine, oxoassoanine, pratosine and ismine by radical cyclisation

Tetrahedron

Volumn 53, Issue 1, 1997, Pages 299-306

  Rosa, Ana M ^a   Lobo, Ana M ^a   Branco, Paula S ^a   Prabhakar, Sundaresan ^a   Sá Da Costa, Margarida ^a  

^a UNIVERSIDADE NOVA DE LISBOA   (Portugal)

Author keywords

[No Author keywords available]

Indexed keywords

ALKALOID; ASSOANINE; ISMINE; OXOASSOANINE; PRATOSINE; UNCLASSIFIED DRUG; VASCONINE;

ARTICLE; DRUG SYNTHESIS; INFRARED SPECTROPHOTOMETRY; MASS SPECTROMETRY; NUCLEAR MAGNETIC RESONANCE; PRIORITY JOURNAL; REACTION ANALYSIS;

EID: 0031060463     PISSN: 00404020     EISSN: None     Source Type: Journal    
DOI: 10.1016/S0040-4020(96)00985-4     Document Type: Article

References (27)

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21. For an alternative synthesis of ismine from N-norismine by N monomethylation of the latter see: Prabhakar, S.; Lobo, A. M.; Marques, M. M.; Tavares, M. R. J. Chem. Res. (S), 1985, 394. For other syntheses of ismine see: Hill, R. K.; Carlson, R. M. J. Org. Chem., 1965,30, 1571; Siddiqui, M. A.; Snieckus, V. Tetrahedron Lett., 1988, 29, 5463.
22. For an alternative synthesis of ismine from N-norismine by N monomethylation of the latter see: Prabhakar, S.; Lobo, A. M.; Marques, M. M.; Tavares, M. R. J. Chem. Res. (S), 1985, 394. For other syntheses of ismine see: Hill, R. K.; Carlson, R. M. J. Org. Chem., 1965,30, 1571; Siddiqui, M. A.; Snieckus, V. Tetrahedron Lett., 1988, 29, 5463.
23. A blank experiment performed, under identical experimental conditions, showed that N-norismine was not converted into the phenanthridine 13.
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25. •.
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