## 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
Zur Kenntnis der Triterpene. 183. Mitteilung. Über die Konstitution und Konfiguration von Tirucallol, Euphorbol und Elemadienolsäure
✍ Scribed by D. Arigoni; O. Jeger; L. Ruzicka
- Publisher
- John Wiley and Sons
- Year
- 1955
- Tongue
- German
- Weight
- 564 KB
- Volume
- 38
- Category
- Article
- ISSN
- 0018-019X
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✦ Synopsis
Abstract
- 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.
📜 SIMILAR VOLUMES
## Abstract 1. Es wurde die Identität von Tirucallenol mit Δ^8^‐3 β‐Oxy‐elemen (III) bewiesen.
## Abstract Das Carboxyl und die hydrierbare Doppelbindung der tetracyclischen, zweifach ungesättigten Oxysäure Elemadienolsäure sind in derselben Seitenkette von 8 Kohlenstoffatomen enthalten, für welche die Konstitutionsvarianten A oder B equation image zur Diskussion stehen.
## 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.
## Abstract The validity of the old formula I for α‐amyrin is once more confirmed in the light of former experimental evidence. The stereochemistry of rings A, B, C and D of α‐amyrin is discussed.
Dans la condensation du p-cymbne et des alcools amylique ou biitylique tertiaires sous l'action d'acide sulfurique concentrk, il est obtenu par une reaction de transfert d'hydrogbne, non pas un p-cy-m6ne alcoyl6 correspondant, mais des indanes alcoyl6s parmi lesqurls nn t&ram6thyl-l,3,3,6-p-tolyl-l-