## Abstract Earlier phytochemical work on __Plectranthus ambiguus__ (Lamiaceae) afforded a series of tetracyclic phyllocladane‐type (=13__β__‐kaurane) diterpenoids (see **1a**–**f**). In the course of investigations concerning the reaction behavior of this rare natural‐products, a new constituent o
✦ LIBER ✦
Phyllocladanes (13β-kauranes) from Plectranthus ambiguus
✍ Scribed by Gui Liu; Peter Rüedi
- Book ID
- 103342251
- Publisher
- Elsevier Science
- Year
- 1996
- Tongue
- English
- Weight
- 474 KB
- Volume
- 41
- Category
- Article
- ISSN
- 0031-9422
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## Abstract The conversion of 2__α__,3__α__‐dioxy‐substituted phyllocladane derivatives into the corresponding 3‐ketone proceeds in an unexpected manner: Depending on the reaction conditions, the corresponding 3__β__‐hydroxy‐substituted compound is formed almost quantitatively, or the desired keton