## Abstract The UV.‐isomerisation of 11‐oxo‐14β,17α‐pregnane **9** to the 11,19‐cyclo‐derivative **11** is described. In addition the Pb(OAc)~4~‐fragmentation of photoproduct **11** was investigated. **11** yielded besides the expected 11‐oxo‐19‐hydroxy‐pregnane **18** the novel 9,11‐seco‐11,19‐cyc
✦ LIBER ✦
Photochemische Reaktionen. 72. Mitt. [1]. Zur Photofragmentierung von 14β-Hydroxy-20-oxo-Δ16-Steroiden
✍ Scribed by Franz Marti; Hansuli Wehrli; Oskar Jeger
- Publisher
- John Wiley and Sons
- Year
- 1973
- Tongue
- German
- Weight
- 478 KB
- Volume
- 56
- Category
- Article
- ISSN
- 0018-019X
No coin nor oath required. For personal study only.
✦ Synopsis
Abstract
On UV. irradiation in i‐octane or t‐butyl alcohol the α,β‐unsaturated δ‐hydroxy ketone 2 undergoes fragmentation to the novel 14,15‐seco‐steroid 3.
📜 SIMILAR VOLUMES
Photochemische Reaktionen. 76.Mitteilung
✍
Peter Gull; Yoshihisa Saito; Hansuli Wehrli; Oskar Jeger
📂
Article
📅
1974
🏛
John Wiley and Sons
🌐
German
⚖ 701 KB
Steroide und Sexualhormone 242. Mitteilu
✍
Frl. E. Gössinger; W. Graf; R. Imhof; H. Wehrli
📂
Article
📅
1971
🏛
John Wiley and Sons
🌐
German
⚖ 291 KB
👁 1 views
## Abstract A novel method for the reductive epoxide opening in a 14β, 15β‐epoxy‐20‐oxo‐Δ^16^‐pregnene **4** affords an almost quantitative yield of the 14β‐hydroxy‐20‐oxo‐Δ^16^‐pregnene **5.** This leads to a considerable improvement of the formerly published synthesis of 3‐O‐methyl 17 α, 20ξ‐tetr