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Photolysis of 1,1,4,4-tetraphenyl-3-buten-2-one: ketene formation from an acyclic .alpha.,.beta.-unsaturated ketone

✍ Scribed by Adam, Waldemar; Berkessel, Albrecht; Peters, Eva Maria; Peters, Karl; Von Schnering, Hans Georg

Book ID: 127230628
Publisher: American Chemical Society
Year: 1985
Tongue: English
Weight: 568 KB
Volume: 50
Category: Article
ISSN: 0022-3263
DOI: 10.1021/jo00216a001

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## Abstract On ^1^n,π\*‐excitation, the title compound **2** undergoes a photoinduced intramolecular [4 + 2]‐cycloaddition affording the tetracyclic enol ether **3** as the only product in 79% yield. The assigned structure of **3** was confirmed by its conversion to the __p__‐nitrobenzoate **6** wh