13C-NMR. Spectroscopy of Naturally Occurring Substances. XXXII. Vincaleucoblastine and related alkaloids

Autor: E. W. Hagaman, Ernest Wenkert, Jean C. Miller, Gerald E. Gutowski, Bansi Dr. Lal, Allen S. Katner, Norbert Neuss
Rok vydání: 1975
Předmět:
Zdroj: Helvetica Chimica Acta. 58:1560-1567
ISSN: 1522-2675
0018-019X
DOI: 10.1002/hlca.19750580608
Popis: The total assignment of the 13C-shifts of the complex Vinica rosea L. alkaloids vincaleucoblastine, leurosidine and leurosine and of a synthetic isomer of the latter is presented. The structure of leurosidine is corrected and a tentative structure for the acid-catalyzed product of isomerization of leurosine is proposed.
Databáze: OpenAIRE