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.
β¦ LIBER β¦
ChemInform Abstract: Ring Transformation of 5-Acylpyrimidines and 5-Acyluracils into Pyrazoles with Hydrazines in Acidic Medium
β Scribed by K. TAKAGI; M. HUBERT-HABART
- Publisher
- John Wiley and Sons
- Year
- 2010
- Weight
- 25 KB
- Volume
- 28
- Category
- Article
- ISSN
- 0931-7597
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