Seven new monoterpenoid indole alkaloids from Gelsemium elegans

Seven new indole alkaloids were isolated from the roots of Gelsemium elegans Benth. and their structures were determined by spectroscopic analysis and chemical transformation from known alkaloids. Kounaminal (1) is a new koumine-type alkaloid that contains an unusual aminal moiety. Humantenoxenine (...

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Bibliographic Details
Published inChemistry, an Asian journal Vol. 6; no. 1; p. 166
Main Authors Yamada, Yousuke, Kitajima, Mariko, Kogure, Noriyuki, Wongseripipatana, Sumphan, Takayama, Hiromitsu
Format Journal Article
LanguageEnglish
Published Germany 03.01.2011
Subjects
Gelsemium - chemistry
Magnetic Resonance Spectroscopy
Molecular Structure
Plant Roots - chemistry
Secologanin Tryptamine Alkaloids - chemistry
Secologanin Tryptamine Alkaloids - classification
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Summary:Seven new indole alkaloids were isolated from the roots of Gelsemium elegans Benth. and their structures were determined by spectroscopic analysis and chemical transformation from known alkaloids. Kounaminal (1) is a new koumine-type alkaloid that contains an unusual aminal moiety. Humantenoxenine (2) and 15-hydroxyhumantenoxenine (3) are humantenine-type alkaloids that contain a novel β-amino-α,β-unsaturated ketone residue. The other four novel alkaloids are two gelsedilam-related and two gelsenicine-related alkaloids.
ISSN:1861-471X
DOI:10.1002/asia.201000538