Formation of 2,3-dihydro-4(1H)-quinolones and related compounds via Fries-type acid-catalysed rearrangement of 1-arylazetidin-2-ones
✍ Scribed by Kano, Shinto; Ebata, Tsutomu; Shibuya, Shiroshi
- Book ID
- 115537756
- Publisher
- Royal Society of Chemistry
- Year
- 1980
- Weight
- 780 KB
- Volume
- 0
- Category
- Article
- ISSN
- 1472-7781
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📜 SIMILAR VOLUMES
Substituted 3-hydroxyquinoline-2,4(1H,3H )-diones 3 were transformed into 3-acyloxy-1,3-dihydro-2H-indol-2-ones 4 and isomeric 4-acyl-1,4-dihydro-3,1-benzoxazin-2-ones 5. The influence of the substituents and the reaction conditions on the course of the reaction was studied. In the proposed mechanis
## 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