期刊
TETRAHEDRON
卷 75, 期 40, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tet.2019.130562
关键词
Tabernaemontana bovina; Tacamine alkaloids; Tabercamines A-K; Configuration determination
资金
- Applied Basic Research Project of Yunnan Province [2016FA030]
- National Natural Science Foundation of China [31370377]
Eleven undescribed tacamine type alkaloids, named tabercamines A-K were isolated from leaves of Tabernaemontana bovina, together with six known alkaloids. The planar structure of the undescribed alkaloids were determined by comprehensive spectroscopic data analysis. Their absolute configuration were established based on the combination of the electronic circular dichroism and single X-ray crystal diffraction analysis. The NMR rules (in acetone-d(6)) of identifying of the stereo-configuration at C-20/16 was established. (C) 2019 Elsevier Ltd. All rights reserved.
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