Synthesis, tautomeric structure, dyeing characteristics, and antimicrobial activity of novel 4-(2-arylazophenyl)-3-(2-hydroxyphenyl)-1-phenyl-2-pyrazolin-5-ones

MA Metwally, S Bondock, SI El-Desouky…

文献索引：Metwally; Bondock; El-Desouky; Abdou Journal of the Korean Chemical Society, 2012 , vol. 56, # 1 p. 82 - 91

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被引用次数: 9

摘要

ABSTRACT. Novel azopyrazolin-5-one dyes 4a-f were synthesized by the regioselective reaction of phenylhydrazine with 2, 3, 4-chromantrione-3-arylhydrazones 2a-f. The acid dissociation constants pKa for the series prepared were determined and correlated by the Hammett equation. The results of such correlation together with the spectral data indicated that the studied compounds exist predominantly in the hydrazone keto structure,(D) as the ...