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Photochemical Reactions 150th Communication. Wavelength Dependence of the Photochemistry of 7-Methyl-β-ionone

✍ Scribed by Peter Mathies; Takehiko Nishio; Bruno Frei; Oskar Jeger


Publisher
John Wiley and Sons
Year
1989
Tongue
German
Weight
608 KB
Volume
72
Category
Article
ISSN
0018-019X

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📜 SIMILAR VOLUMES


Photochemical reactions. 142nd communica
✍ Peter Mathies; Bruno Frei; Oskar Jeger 📂 Article 📅 1985 🏛 John Wiley and Sons 🌐 German ⚖ 333 KB

## Abstract On singlet excitation (λ = 254 nm), the epoxydiene (__E__)‐**3** underwent (__E__)/(__Z__)‐isomerization, electrocyclic ring closure of the diene side chain leading to the cyclobutenes **4A + B**, and rearrangement to the cyclohexanones **5A + B**. Compounds **5A + B** were presumably f

Photochemical Reactions. 80th Communicat
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## Abstract Irradiation of a pentane solution of (__E__)‐dehydro‐β‐ionone‐epoxide (**1**) with light from a medium pressure mercury lamp using acetone as filter led to formation of the __isomers__ **2**, **3, 4** and **5** by novel photochemical processes.

Photochemical reactions. 144th Communica
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## Abstract On triplet excitation (λ > 280 nm, acetone), the epoxydiene (__E__)‐**5** undergoes initial cleavage of the C(5)O bond of the oxirane and subsequent cleavage of the C(6)C(7) bond leading to the diradical intermediate e which reacts by recombination furnishing the cyclic compounds (__E