𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Friedelanes from Crossopetalum lobatum. A New Example of a Triterpene Anhydride

✍ Scribed by Félix M. Rodríguez; Nayra R. Perestelo; Ignacio A. Jiménez; Isabel L. Bazzocchi

Book ID
102256837
Publisher
John Wiley and Sons
Year
2009
Tongue
German
Weight
151 KB
Volume
92
Category
Article
ISSN
0018-019X

No coin nor oath required. For personal study only.

✦ Synopsis

Three new triterpenoids, lobatanhydride (1), 3a,25-dihydroxyfriedelan-2-one (2) and 1b,25dihydroxyfriedelan-3-one (3), were isolated from Crossopetalum lobatum Lundell. In addition, four known friedelane triterpenes, friedelin (4), 2a-hydroxy-3-oxofriedelan-30-oic acid (5), 28-hydroxyfriedelane-1,3-dione (6), and 29-hydroxyfriedelane-1,3-dione (7) were isolated. Lobatanhydride represents the first example of a triterpene anhydride with the A ring expanded to a seven-membered ring. The structures were established on the basis of extensive spectral investigation, and by comparison with the respective literature values.

📜 SIMILAR VOLUMES

Structure elucidation of a new friedelan
Structure elucidation of a new friedelane triterpene from the mangrove plant Hibiscus tiliaceus
✍ Liya Li; Xueshi Huang; Isabel Sattler; Hongzheng Fu; Susanne Grabley; Wenhan Lin 📂 Article 📅 2006 🏛 John Wiley and Sons 🌐 English ⚖ 155 KB

## Abstract From the stem and bark of the mangrove plant __Hibiscus tiliaceus__, a new friedelane‐type triterpene named 27‐oic‐3‐oxo‐28‐friedelanoic acid (1) together with eight known triterpenoids involving five friedelane‐type derivatives was isolated. The structure of 1 was determined by extensi