| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 5225474 | Tetrahedron | 2008 | 5 Pages |
Abstract
Four new gelsedine-type oxindole alkaloids (1-4) were isolated from the leaves and branches of Gelsemium elegans, together with 10 known alkaloids. The structures of the new alkaloids were determined by spectroscopic analyses and partial synthesis from known compounds. Gelsecrotonidine (1), 14-hydroxygelsecrotonidine (2), and 11-methoxygelsecrotonidine (3) possess an additional C2 unit with an acetic acid residue compared to gelsenicine-related monoterpenoid indole alkaloids. 14-Hydroxygelsedilam (4) is an 18,19-nor-type monoterpenoid indole alkaloid.
Graphical abstractDownload full-size image
Related Topics
Physical Sciences and Engineering
Chemistry
Organic Chemistry
Authors
Yousuke Yamada, Mariko Kitajima, Noriyuki Kogure, Hiromitsu Takayama,