**π, π\*‐Induced Photocleavage of γ, δ‐Epoxy‐eucarvone**. On ^1^π, π\*‐excitation **1** undergoes cleavage of the C, C‐oxirane bond (**1** → **c**) and isomerizes to the bicyclic dihydrofurane compound **5**. In addition, **1** shows photocleavage of the C (γ), O‐oxirane bond (**1** → **d**) and gi
Photochemische Reaktionen. 9. Mitteilung. Notiz zur lichtkatalysierten Zersetzung von Δ1-Pyrazolinen
✍ Scribed by K. Kocsis; P. G. Ferrini; D. Arigoni; O. Jeger
- Publisher
- John Wiley and Sons
- Year
- 1960
- Tongue
- German
- Weight
- 261 KB
- Volume
- 43
- Category
- Article
- ISSN
- 0018-019X
No coin nor oath required. For personal study only.
✦ Synopsis
Abstract
Photolysis of different steroidal pyrazolines with UV.‐light is shown to be an efficient method for the preparation of the corresponding cyclopropyl compounds.
📜 SIMILAR VOLUMES
## Abstract UV.‐irradiation (λ = 254 nm) of the hydroxy‐enones **3** and **6** in acetonitrile results in the cyclization to the unstable isomeric allylic alcohols **4** and **7**, which dehydrate easily to the isolated unsaturated ether **5** and **8**. The racemic γ,δ‐dihydroxy‐enone **9** upon i
Zur Photoisomerisierung von (E)-y-Hydroxyenonen vgl. [8]. S. Ergebnisse der Photolysen in Acetonitril-d3 bzw. Trichlortrifluorathan unter lH-NMR.-spektroskopischer Kontrolle (exper. Teil und Tub.). Bei der Photolyse mit Licht von 1>347 nm tritt rasche (E-rZ)-Isomerisierung von (a-2 auf [9]. Die Mogl
**The Photochemistry of Conjugated Epoxy‐enones: Photolysis of 9‐Isopropyl‐6‐methyl‐9,10‐epoxybicyclo [4.4.0]dec‐l‐en‐3‐on** The title compound **1** undergoes on π, π\*‐excitation vinylogous β‐cleavage of the C(γ), O‐bond and isomerizes to the unsaturated 1, 5‐diketone**8**(58%) and the tricyclic
**Photocleavage of Conjugated π,π‐Epoxyenones. UV.‐Irradiation of 3‐(1′,2′‐Epoxy‐2′‐methyl‐prop‐1′‐yl)‐5,5‐dimethyl‐2‐cyclohexene‐1‐one** On ^1^π,π\*‐excitation (δ = 254 nm) **9** undergoes cleavage of the C(δ), C(δ)‐bond yielding **17** and **a**, which gives **18** by photofragmentation. In prese