Abstract
The two D:A-friedo-oleanane triterpenes kokzeylanol and kokzeylanonol isolated from the inner bark of Kokoona zeylanica have been characterized as 6β,27-dihydroxy-D:A -friedo-olean-3-one and 6β,27-dihydroxy-D:A-friedo-olean-3,21-dione, respectively, by the deoxygenation of their 27-acetoxy derivatives using lithium-ethylenediamine reduction coupled with spectroscopic and irradiation methods. Kokzeylanonol represents the first tetra-oxygenated D:A-friedo-oleanane triterpene obtained from a nautral source. Significance of some of these D:A-friedo-oleananes in the biosynthesis of quinonoid triterpenes in Celastraceae is discussed.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 805-809 |
| Number of pages | 5 |
| Journal | Tetrahedron |
| Volume | 40 |
| Issue number | 4 |
| DOIs | |
| State | Published - 1984 |
| Externally published | Yes |
ASJC Scopus subject areas
- Biochemistry
- Drug Discovery
- Organic Chemistry
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