Polycycloiridals A鈥揇, Four Iridal-Type Triterpenoids with an 伪-Terpineol Moiety from Iris tectorum
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- 作者：Chun-Lei Zhang ; Yan-Fei Liu ; Yan Wang ; Dong Liang ; Zhi-Bo Jiang ; Li Li ; Zhi-You Hao ; Huan Luo ; Guo-Ru Shi ; Ruo-Yun Chen ; Zheng-Yu Cao ; De-Quan Yu
- 刊名：Organic Letters
- 出版年：2015
- 出版时间：November 20, 2015
- 年：2015
- 卷：17
- 期：22
- 页码：5686-5689
- 全文大小：260K
- ISSN：1523-7052
文摘
Polycycloiridals A鈥揇, four novel iridals with an unprecedented 伪-terpineol moiety resulting from cyclization of the homofarnesylside chain, were isolated from the ethanol extract of rhizomes of Iris tectorum. Their structures were elucidated on the basis of comprehensive spectroscopic analysis. The absolute configuration of 1 was determined by the modified Mosher鈥檚 method and comparison of experimental and calculated electronic circular dichroism (ECD) spectrum. A possible biosynthetic pathway was postulated.