Spectroscopic analyses and chemical transformation for structure elucidation of two novel indole alkaloids from Gelsemium elegans |
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| Authors: | Yousuke Yamada Noriyuki Kogure Hiromitsu Takayama |
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| Affiliation: | a Graduate School of Pharmaceutical Sciences, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan
b Faculty of Pharmaceutical Sciences, Chulalongkorn University, Bangkok 10500, Thailand |
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| Abstract: | Two new monoterpenoid oxindole alkaloids, gelsevanillidine (1) having an additional vanillin residue on gelsenicine-type alkaloid and gelseoxazolidinine (2) possessing an unusual oxazolidine ring, were isolated from Gelsemium elegans. To confirm their structures, the chemical transformation of a humantenine-type alkaloid into gelsevanillidine (1) and the deacetoxy derivative of gelseoxazolidinine was performed. |
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| Keywords: | Gelsemium Indole Alkaloid Gelsedine Spectroscopy Chemical transformation |
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