✦ LIBER ✦

Photochemische Reaktionen. 89. Mitteilung [1]. Zur Photochemie konjugierter Epoxy-diene I. Versuche mit (E),β-Jonyliden-epoxiden

✍ Scribed by Alex Peter Alder; Hans Richard Wolf; Oskar Jeger

Publisher: John Wiley and Sons
Year: 1976
Tongue: German
Weight: 469 KB
Volume: 59
Category: Article
ISSN: 0018-019X
DOI: 10.1002/hlca.19760590321

No coin nor oath required. For personal study only.

✦ Synopsis

Photolysis of conjugated epoxy‐dienes

UV.‐irradiation (λ = 254 nm) of (E),β‐ionylidene‐epoxide (3) in n‐pentane gives the isomeric cyclopropene‐ketone 7 (90%) in a hitherto unreported type of photoreaction. The methylsubstituted (E),β‐ionylidene‐epoxide 6, however, undergoes (E/Z)‐photoisomerization to the (Z),β‐ionylidene‐epoxide 8 (91%).

📜 SIMILAR VOLUMES

Photochemische Reaktionen. 97 Mitteilung

Photochemische Reaktionen. 97 Mitteilung [1]. Zur Photochemie konjugierter Epoxy-diene II. Versuche mit (E)-β-Jonyliden-epoxiden

✍ Alex Peter Alder; Hans Richard Wolf; Oskar Jeger 📂 Article 📅 1978 🏛 John Wiley and Sons 🌐 German ⚖ 923 KB

**Photolysis of Conjugated Epoxy‐dienes** Direct and sensitized excitation of the (__E__)‐β‐ionylidene‐epoxides **1** and **4** leads to different types of isomerizations. Thus photocycloelimination to the cyclopropene‐ketones **2** and **6** is only achieved by ^1^(π, π\*)‐excitation (λ=254 nm), w