## Abstract 1. By degradation of the tetracyclic alcohol tirucallol (V) into the tricyclic compound XI and methyl L‐(+)‐2,6‐dimethyl‐oenanthate (X) it has been shown that tirucallol differs from the isomeric triterpene euphol (I) only in the configuration of carbon atom 20.
Zur Kenntnis der Triterpene. 188. Mitteilung. Beweis für die Konstitution und Konfiguration von Tirucallol, Euphol, Euphorbol, Elemadienol- und Elemadienonsäure
✍ Scribed by E. Ménard; H. Wyler; A. Hiestand; D. Arigoni; O. Jeger; L. Ruzicka
- Publisher
- John Wiley and Sons
- Year
- 1955
- Tongue
- German
- Weight
- 805 KB
- Volume
- 38
- Category
- Article
- ISSN
- 0018-019X
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✦ Synopsis
Abstract
Elemadienolic acid has been converted into the acetoxy‐phenol‐lactone XXXV, which is enantiomeric to the corresponding compound (XXII) obtained from lanosterol (XVII). This result represents the final proof of the structure and configuration of elemadienolic acid shown in formula XV and eo ipso of the related compounds euphol (I), tirucallol (IV), elemadienonic acid (VIII) and euphorbol (XVI).
📜 SIMILAR VOLUMES
## Abstract It is shown that the isomeric alcohols euphol and lanosterol differ only in the configuration of carbon atoms 13, 14 and 17. In all further structural and steric details the two alcohols are identical.
A 2 O j 22-2 1 -0 x y -n o r -a110c h olens Bur e -l a c t o n (VIII). Auf die Isolierung des 20-Oxy-lactons wurde verzichtet. Diejenigen Praktionen, die einen positiven LegaZ-Test zeigten, wurden aus Methanol umkrystallisiert, wobei ein Praparat vom konstanten Smp. 170O erhalt en wurde. [.ID = f1,3