5-Hydroxy-2-pyrazolines and Some of Their 1-Substituted Analogs

…, AR Tugusheva, SI Yakimovich, VV Alekseev…

Index: Zelenin; Tugusheva; Yakimovich; Alekseev; Zerova Chemistry of Heterocyclic Compounds, 2002 , vol. 38, # 6 p. 668 - 676

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Citation Number: 19

Abstract

Abstract The use of 1, 3-dicarbonyl compounds containing strong electron-withdrawing substituents (perfluoroalkyl, 4-nitrophenyl) at one of the carbonyl groups in reaction with hydrazine or its monosubstituted derivatives (4-nitro-and 2, 4-dinitrophenylhydrazines) leads to the formation of stable intermediates for the synthesis of pyrazoles (5-hydroxy-2- pyrazolines) or their linear tautomers (hydrazones).

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