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ChemInform Abstract: Migration of an Acyl Group in the Pyrazole System: Synthesis of 1-Acyl-3-hydroxy-1H-pyrazoles and Related Derivatives. A New Preparation of N,N′-Diacylhydrazines.

✍ Scribed by V. KEPE; F. POZGAN; A. GOLOBIC; S. POLANC; M. KOCEVAR

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

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✦ Synopsis

Migration of an Acyl Group in the Pyrazole System: Synthesis of 1-Acyl-3-hydroxy-1H-pyrazoles and Related Derivatives.

A New Preparation of N,N'-Diacylhydrazines.

-Ringtransformation of ethoxymethylene-oxazolone (I) with hydrazine derivatives affords title compounds (III) in good yields. The proposed mechanism includes a migration of an acyl or related unit. This observation is used for a novel approach to symmetrically N,N'-diacylhydrazines (IV). -(KEPE, V.; POZGAN, F.;

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