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Synthesis of 3 β ,3 β ,5‐tribromoacetyl‐4‐hydroxy‐6‐methyl‐2 H ‐pyran‐2‐one by Bromination of Dehydroacetic Acid

✍ Scribed by Kumar, Ajay; Prakash, Richa; Singh, Shiv P.


Book ID
120398029
Publisher
Taylor and Francis Group
Year
2005
Tongue
English
Weight
111 KB
Volume
35
Category
Article
ISSN
0039-7911

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Synthesis of bipyrazoles and pyrazoloiso
✍ Abderrahman Bendaas; Maâmar Hamdi; Nicole Sellier 📂 Article 📅 1999 🏛 Journal of Heterocyclic Chemistry 🌐 English ⚖ 249 KB

## Abstract Phenylhydrazine or hydrazine react with 3‐acetyl‐4‐hydroxy‐6‐methyl‐2__H__‐pyran‐2‐one (1) to give 4‐acetoacetyl‐3‐methylpyrazolin‐5‐ones 4. The synthesis of bipyrazoles and pyrazoloisoxazoles from 4 are reported.