Selacyclicbiflavone A, an unusual macrocyclic biflavone from Selaginella uncinata (Desv.) Spring

被引:20
作者
Zou, Hui [1 ,3 ]
Xu, Ping-Sheng [1 ]
Liu, Rui [2 ]
Zou, Zhen-Xing [2 ]
Li, Jing [2 ]
Zhong, Ai-Guo [4 ]
Hu, Jian-Zhong [1 ]
Xu, Kang-Ping [2 ]
Tan, Gui-Shan [1 ,2 ]
机构
[1] Cent South Univ, Xiangya Hosp, Changsha 410008, Hunan, Peoples R China
[2] Cent South Univ, Sch Pharmaceut Sci, Changsha 410013, Hunan, Peoples R China
[3] Hunan Normal Univ, Coll Med, Changsha 410013, Hunan, Peoples R China
[4] Taizhou Univ, Sch Pharmaceut & Chem Engn, Taizhou 31700, Peoples R China
基金
中国国家自然科学基金;
关键词
Selaginella uncinata; Selacyclicbiflavone A; Selaginella; Biflavone; Biosynthetic pathway; SUBSTITUENT;
D O I
10.1016/j.tetlet.2016.01.038
中图分类号
O62 [有机化学];
学科分类号
070303 ; 081704 ;
摘要
An unusual macrocyclic biflavone, selacyclicbiflavone A (1), have been isolated from Selaginella uncinata. The structure was elucidated on the basis of rigorous spectroscopic analysis including 1D and 2D NMR experiments as well as HRESIMS techniques. The absolute stereochemistry of compound 1 was further confirmed by comparing experimental data with calculated electronic circular dichroism (ECD) spectra. This is the first report of the macrocyclic biflavone with an unprecedented methylene bridge. A possible biosynthetic pathway was also postulated. (C) 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码:892 / 894
页数:3
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