## Abstract A study of the reactions involved in the preparation of 16α‐methyl‐17α‐hydroxy‐21‐acetoxy‐Δ^1;4;9,11^‐pregnatriene‐3, 20‐dione (V) from the corresponding 11α‐sulfonyloxy‐2,4‐dibromo‐allopregnane‐3,20‐diones led to a process in which all three substituents in 2‐, 4‐ and 11α‐positions are
Über Steroide. 113. Mitteilung. Zur Herstellung von 11-Keto-Derivaten aus im Ring C unsubstituierten Steroiden
✍ Scribed by K. Heusler; A. Wettstein
- Publisher
- John Wiley and Sons
- Year
- 1953
- Tongue
- German
- Weight
- 723 KB
- Volume
- 36
- Category
- Article
- ISSN
- 0018-019X
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✦ Synopsis
Abstract
A study of the transformation of Δ^7^‐9, 11α‐oxidosteroids into Δ^8^‐11‐ketosteroids leads to a new two‐step process giving excellent yields. Thus Δ^8^‐11‐ketones of the ergostane, androstane and, for the first time, also of the cholestane series are prepared. Δ^7^‐11‐ketosteroids appear as intermediates which, according to their reactions, seem to belong to the 9β‐series. On the basis of this observation a reaction mechanism for the isomerisation of epoxides into ketones is presented.
📜 SIMILAR VOLUMES
## Abstract Als Ergänzung zu unserer kürzlich veröffentlichten Arbeit „Ein neuer Weg zur Synthese von 11‐Keto‐Steroiden”︁ (l. c.) geben wir in der vorliegenden Mitteilung weitere Resultate bekannt, die in der Androstan‐ und der Cholestan‐Reihe erzielt wurden. Die Endprodukte dieser Versuche sind da