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Synthesis of 1-acyl-5-pyrazolones and pyrrolidino[2,3-c]pyrazol-3-ones

✍ Scribed by Maria Teresa Cocco; Cenzo Congiu; Antonio Maccioni


Book ID
112129580
Publisher
Journal of Heterocyclic Chemistry
Year
1990
Tongue
English
Weight
204 KB
Volume
27
Category
Article
ISSN
0022-152X

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Synthesis of 1-acyl-1,2-dihydro-3H-pyraz
✍ Hiroshi Maruoka; Kenji Yamagata; Fumi Okabe; Yukihiko Tomioka πŸ“‚ Article πŸ“… 2006 πŸ› Journal of Heterocyclic Chemistry 🌐 English βš– 140 KB

## Abstract magnified image The unusual formation of 1‐acyl‐1,2‐dihydro‐3__H__‐pyrazol‐3‐ones starting from 3‐acyloxypyrazoles by Fries‐type rearrangement is described. Under normal conditions, acylation of 2,4‐dihydro‐3__H__‐pyrazol‐3‐ones **1** and **2** with acid chlorides or anhydrides in the