Alkaloids from Ammocharis tinneana
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Date
1999
Authors
Machocho, Alex K.
Chhabra, S. C.
Viladomat, F.
Codina, C.
Bastida, J.
Journal Title
Journal ISSN
Volume Title
Publisher
Phytochemistry
Abstract
Sixteen alkaloids have been isolated from fresh bulbs of Ammocharis tinneana (Amaryllidaceae), seven of which contain a 1,2β-epoxide group. 6α-Hydroxycrinamidine and 6α-hydroxyundulatine are reported here for the first time from a natural source. The structures and stereochemistry of these new alkaloids have been determined by physical and spectroscopic methods. 1H and 13C NMR spectra of flexinine, 1,2β-epoxyambelline and 11-O-acetyl-1,2β-epoxyambelline were completely assigned by means of 2D NMR techniques.
Description
DOI: http://dx.doi.org/10.1016/S0031-9422(99)00118-1
Keywords
Ammocharis tinneana, Amaryllidaceae, Alkaloids, Lycorine, Sternbergine, 9-O-Demethylpluviine, Crinine, Powelline, Buphanisine, Buphanidrine, Ambelline, 11-O-Acetylambelline, Flexinine, Crinamidine, 6α-Hydroxycrinamidine, Undulatine, 6α-Hydroxyundulatine, 1,2β-Epoxyambelline, 11-O-Acetyl-1,2β-epoxyambelline
Citation
Phytochemistry, 51 1185-1191.