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An unusual ring transformation: Reaction of phenyl 4-chromone-3-sulfonate with methyl 3-aminocrotonate

✍ Scribed by Werner Löwe; Peter Jeske; Anneliese Kradepohl


Book ID
112128912
Publisher
Journal of Heterocyclic Chemistry
Year
1988
Tongue
English
Weight
145 KB
Volume
25
Category
Article
ISSN
0022-152X

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3/4-phenylene bisheterocycles from ring
✍ Ravindra R. Kamble; Prashant R. Latthe; Bharati V. Badami 📂 Article 📅 2007 🏛 John Wiley and Sons 🌐 English ⚖ 90 KB

## Abstract The bifunctional 3/4‐[acetyl]phenylsydnones **1a, 1b** were subjected to a one‐pot ring conversion to 3‐[3/4‐acetyl]phenyl‐5‐methyl‐3__H__‐[1,3,4]‐oxadiazol‐2‐ones **2a, 2b**, which on further bromination yielded the 3‐[3/4‐bromoacyl]phenyl‐5‐methyl‐3__H__‐[1,3,4]‐oxadiazol‐2‐ones **3a,