Photodimerisierung von 1‐(4‐Chlorphenyl)‐1‐hexen‐3‐on

Ebner, Ulrich; Otto, Hans‐Hartwig

doi:10.1002/ardp.19783111112

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1979

1981

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“…Daß nämlich bei der erfolgten Photodimerisierung von 1 eine truxinsäureartige Cycloaddition der Doppelbindungen C-7/C-8 eingetreten war, kann aus den durch metastabile Peaks gesicherten Fragmentionen AA, AB und BB gefolgert werden. Ein Zerfall, entsprechend der Fragmente AA und BB, wäre bei einer truxillsäureanalogen Struktur nicht möglich [3,4].…”

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Photodimerisierung von 6-trans-Styryl-4-methoxy-2-pyron (= 5.6-Dehydrokawain), 1. Mitteilung / Photodimerisation of 6-trans-Styryl-4-methoxy-2-pyrone (= 5,6-Dehydrokawain)

Kaloga

Christiansen

1981

Zeitschrift Für Naturforschung B

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Abstract The photochemical behaviour of 5,6-Dehydrokawain (1) was investigated. An aceton solution of 1 was placed into a Petri-dish and allowed to evaporate. After a four weeks irradiation with a 100 W light bulb from a distance of 30 cm [1] the main component was isolated. Its structure and configuration is elucidated as r-1,c-2-di[6-(4-methoxy-2- pyronyl) ] - t- 3 ,t -4-diphenyIcyclobutane (2) by means of spectroscopic methods and correlation with β-truxinic acid after degradative reaction.

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