✦ LIBER ✦

Synthesis of bipyrazoles and pyrazoloisoxazoles from 3-acetyl-4-hydroxy-6-methyl-2H-pyran-2-one

✍ Scribed by Abderrahman Bendaas; Maâmar Hamdi; Nicole Sellier

Publisher: Journal of Heterocyclic Chemistry
Year: 1999
Tongue: English
Weight: 249 KB
Volume: 36
Category: Article
ISSN: 0022-152X
DOI: 10.1002/jhet.5570360529

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✦ Synopsis

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.

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