𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Photochemische Reaktionen. 116. Mitteilung [1]. Notiz zur 1γ, δ*-induzierten Photospaltung von γ, δ-Epoxy-eucarvon

✍ Scribed by Kentaro Tsutsumi; Hans Richard Wolf

Publisher
John Wiley and Sons
Year
1980
Tongue
German
Weight
267 KB
Volume
63
Category
Article
ISSN
0018-019X

No coin nor oath required. For personal study only.

✦ Synopsis

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 gives the isomers 2, 3, 6, 7 and 8. Furthermore, the cyclohexenone 9 and the cyclohexene‐1, 4‐dione 10 are formed presumably via an intermediate 13, which could also arise from d. Besides these products the compounds 11 and 12 are obtained, which are photoproducts of 2.

📜 SIMILAR VOLUMES

Photochemische Reaktionen 113. Mitteilun
Photochemische Reaktionen 113. Mitteilung [1]. Zur Photospaltung konjugierter γ, δ-Epoxyenone: UV.-Bestrahlung von 5, 6-Epoxy-3,4-didehydro-5,6-dihydro-β-jonon
✍ Kazuo Murato; Hans Richard Wolf; Oskar Jeger 📂 Article 📅 1980 🏛 John Wiley and Sons 🌐 German ⚖ 603 KB

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

Photochemische Reaktionen 119. Mitteilun
Photochemische Reaktionen 119. Mitteilung [1] Zur Photospaltung konjugierter γ,δ-Epoxyenone. UV.-Bestrahlung von 3-(1′,2′-Epoxy-2′-methyl-prop-1′-yl)-5,5-dimethyl-2-cyclohexen-1-on
✍ Guy De Weck; Hans Richard Wolf 📂 Article 📅 1981 🏛 John Wiley and Sons 🌐 German ⚖ 718 KB

**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

Photochemische Reaktionen. 112. Mitteilu
Photochemische Reaktionen. 112. Mitteilung [1] Zur Photochemie α, β-ungesättigter γ, δ-Epoxyester. III. Ergänzende Untersuchungen zur Triplettreaktivität
✍ Kazuo Murato; Bruno Frei; Wolfhard Bernd Schweizer; Hans Richard Wolf; Oskar Jeg 📂 Article 📅 1980 🏛 John Wiley and Sons 🌐 German ⚖ 650 KB

## Abstract On triplet sensitization (__E__)‐**5** gives (__Z__)‐**5** and isomerizes __via__ C(δ), O‐bond cleavage to the cyclobutanone **6** and the conjugated γ‐ketoester **7**. ‐ On singulet excitation **6** undergoes decarbonylation and yields the bicyclo [4.1.0]heptane **8**. However, on trip

Photochemische Reaktionen. 105. Mitteilu
Photochemische Reaktionen. 105. Mitteilung [1]. Zur Photochemie optisch aktiver λ, δ-Epoxy-enone: Racemisierung und Cyclisierung von (−)-4-Methyliden-5,6-epoxy-5,6-dihydro-β-jonon und (−)-4-Oxo-5,6-epoxy-5,6-dihydro-β-jonon
✍ Bruno Frei; Hans Richard Wolf; Oskar Jeger 📂 Article 📅 1979 🏛 John Wiley and Sons 🌐 German ⚖ 542 KB

**The photochemistry of optical active λ, δ‐epoxy‐enones. Racemization and cyclization of (−)‐4‐methylidene‐5,6‐epoxy‐5,6‐dihydro‐β‐ionone and of (−)‐4‐oxo‐5,6‐epoxy‐5,6‐dihydro‐β‐ionone** UV.‐irradiation (λ ≥ 347 nm as well as λ = 254 nm) converts the conjugated λ, δ‐epoxy‐enones (−)‐**2** and (−)