Schicagenins A鈥揅: Three Cagelike Nortriterpenoids from Leaves and Stems of Schisandra chinensis

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• 作者：Yi-Ming Shi ; Xing-Yao Li ; Xiao-Nian Li ; Xiao Luo ; Yong-Bo Xue ; Cheng-Qin Liang ; Juan Zou ; Ling-Mei Kong ; Yan Li ; Jian-Xin Pu ; Wei-Lie Xiao ; Han-Dong Sun
• 刊名：Organic Letters
• 出版年：2011
• 出版时间：August 5, 2011
• 年：2011
• 卷：13
• 期：15
• 页码：3848-3851
• 全文大小：752K
• 年卷期：v.13,no.15(August 5, 2011)
• ISSN：1523-7052

文摘

Schicagenins A鈥揅 (1鈥?b>3), three unprecedented nortriterpenoids characterized with a tetracyclic oxa-cage motif and C₉ side chain, were discovered from the leaves and stems of Schisandra chinensis. Their structures were determined on the basis of extensive spectroscopic analysis, and the absolute stereochemistries were established by single-crystal X-ray diffraction and CD experiments. A plausible biosynthetic pathway of 1鈥?b>3 was also discussed.