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Synthese von 1,2-Biscumarinyläthen-Derivaten

✍ Scribed by Prof. Dr. F. Eiden; P. Meins

Publisher
John Wiley and Sons
Year
1972
Tongue
English
Weight
560 KB
Volume
305
Category
Article
ISSN
0365-6233

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✍ Wolfram Maicr; Wolfgang Eberbach; Hans Fritz 📂 Article 📅 1991 🏛 John Wiley and Sons 🌐 German ⚖ 406 KB

## On the Synthesis of Derivatives of Pyrido[l,Z-ulazepine The conjugated pyridinium ylides of type 4 undergo 8n-electrocyclisation affording the heterobicyclic allenes 5 which, in the presence of H 2 0 and H202, are subsequently transformed into the substituted pyrido[l,2-a]azepinones 6, a novel