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Title: Crinine-type alkaloids from Hippeastrum aulicum and H. calyptratum
Author: de Andrade, Jean Paulo
Guo, Y.
Font Bardia, Ma. Mercedes
Calvet Pallàs, Maria Teresa
Dutilh, J. H.
Viladomat Meya, Francesc
Codina, C.
Nair, Jerald J.
Zuanazzi, J. A. S.
Bastida Armengol, Jaume
Keywords: Alcaloides
X-ray crystallography
Issue Date: Jul-2014
Publisher: Elsevier Ltd
Abstract: An ongoing search for alkaloids in the Amaryllidaceae species using GC MS resulted in the identification of two crinine-type alkaloids, aulicine (1) and 3-O-methyl-epimacowine, (2) from the indigenous Brazilian species Hippeastrum aulicum and Hippeastrum calyptratum, respectively. In addition, two alkaloids, 11-oxohaemanthamine (3) and 7-methoxy-O-methyllycorenine (4) were both isolated from H. aulicum. Furthermore, we provide here complete NMR spectroscopic data for the homolycorine analogues nerinine (5) and albomaculine (6). The absolute stereochemistry of the 5,10b-ethano bridge in the crinine variants was determined by circular dichroism and X-ray crystallographic analysis, thus presenting the first direct evidence for the presence of crinine-type alkaloids in the genus Hippeastrum.
Note: Versió postprint del document publicat a:
It is part of: Phytochemistry, 2014, vol. 103, p. 188-195
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ISSN: 0031-9422
Appears in Collections:Articles publicats en revistes (Mineralogia, Petrologia i Geologia Aplicada)

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