𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Photochemische Reaktionen. 12. Mitteilung. Zur UV.-Bestrahlung von 17-Oxo-Steroiden

✍ Scribed by H. Wehrli; K. Schaffner


Publisher
John Wiley and Sons
Year
1962
Tongue
German
Weight
345 KB
Volume
45
Category
Article
ISSN
0018-019X

No coin nor oath required. For personal study only.

✦ Synopsis


The behaviour of inorganic cations in thin layer chromatography experiments has been studied. The determining factors were found to be ion-exchange properties of the absorbent and coordination tendencies of the solvent.


📜 SIMILAR VOLUMES


Photochemische Reaktionen. 22. Mitteilun
✍ J. Iriarte; K. Schaffner; O. Jeger 📂 Article 📅 1963 🏛 John Wiley and Sons 🌐 German ⚖ 773 KB

## Abstract The photochemical cyclisation of 11‐keto steroids to 11β, 19‐cyclo‐11‐hydroxy compounds is strongly influenced by steric factors. The presence of a __gem__‐dimethyl group at C‐4 gives rise to a marked improvement in the yield of the cyclic product. The nature of this steric interaction

Photochemische Reaktionen. 24. Mitteilun
✍ B. Nann; D. Gravel; R. Schorta; H. Wehrli; K. Schaffner; O. Jeger 📂 Article 📅 1963 🏛 John Wiley and Sons 🌐 German ⚖ 591 KB

## 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

Photochemische Reaktionen. 76.Mitteilung
✍ Peter Gull; Yoshihisa Saito; Hansuli Wehrli; Oskar Jeger 📂 Article 📅 1974 🏛 John Wiley and Sons 🌐 German ⚖ 701 KB

## 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