Can I read Photochemische Reaktionen. 97 Mitteilung [1]. Zur Photochemie konjugierter Epoxy-diene II. Versuche mit (E)-β-Jonyliden-epoxiden on EtoBox?

Photochemische Reaktionen. 97 Mitteilung [1]. Zur Photochemie konjugierter Epoxy-diene II. Versuche mit (E)-β-Jonyliden-epoxiden by Alex Peter Alder; Hans Richard Wolf; Oskar Jeger is a Chemistry article available to read on EtoBox.

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

**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), whereas ^3^(π, π\*)‐excitation (λ > 280 nm, acetone) gives selective C(1′), O‐cleavage of the oxirane (**1**→**7** – **10** and **4**→**11** – **13**). In contrast to **1** the twofold methylsubstituted epoxy‐diene **4** shows mainly (__E__/__Z__)‐isomerization (**4** → **5**) on both ^1^(π, π\*)‐ and ^3^(π, π\*)‐excitation while the isomerizations **4**→**6** and **4**→**11** – **13** are minor processes, only.

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

Author

Alex Peter Alder; Hans Richard Wolf; Oskar Jeger

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); Wiley-Blackwell; Wiley (ISSN 0018-019X)

Published

1978

Language

DE

Field

Chemistry (Physical Sciences)