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ChemInform Abstract: Transformation of 6-Halopenicillanates into 3-Halo-4-oxoazetidine Derivatives

✍ Scribed by Irena Lukic

Publisher
John Wiley and Sons
Year
2010
Weight
26 KB
Volume
30
Category
Article
ISSN
0931-7597

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ChemInform Abstract: Ring Transformation
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✍ Hikari Morita; Kazuho Harada; Yoshihisa Okamoto; Kaname Takagi πŸ“‚ Article πŸ“… 2010 πŸ› John Wiley and Sons βš– 29 KB πŸ‘ 1 views

Ring Transformation of 3-Halo-4-methoxycoumarins into Pyrazoles with Hydrazines. -Treatment of (I) with hydrazine at room temperature affords the pyrazoles (II). In the reaction of (I) with excess hydrazine and phenylhydrazine unexpected pyrazolinones (III) and (V), respectively, are obtained.