## Abstract The irradiation of 3‐oxo‐10β‐hydroxy‐17β‐acetoxy‐Δ^1;4^‐estradiene (**2**) in dioxane solution with predominantly monochromatic light (2537 Å) yields a mixture of 17‐O‐acetyl‐estradiol (**3**) and the diketone **4**. The latter ist structurally related to products previously obtained by
Photochemische Reaktionen 30. Mitteilung. Die UV.-Bestrahlung von 3β-Hydroxy-11-oxo-lanostan
✍ Scribed by E. Altenburger; H. Wehrli; K. Schaffner
- Publisher
- John Wiley and Sons
- Year
- 1965
- Tongue
- German
- Weight
- 514 KB
- Volume
- 48
- Category
- Article
- ISSN
- 0018-019X
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📜 SIMILAR VOLUMES
## Abstract 1. The photochemical reactivity of testosterone (**1**) is strongly influenced by the nature of the solvent. Dimerization (→**18**), pinacone formation (→**19**)), reactions between the steroid and the solvent molecules (→**20a**, **20b**, **21**) and stereospecific isomerizations (→**2
## Abstract On UV.‐irradiation in __i__‐octane the α,β‐unsaturated ketone **14** is transformed into a mixture of **15** and **16**.
## 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