Synthesis, Tautomeric Structure, Dyeing Characteristics, and Antimicrobial Activity of Novel 4-(2-Arylazophenyl)-3-(2-hydroxyphenyl)-1-phenyl-2-pyrazolin-5-ones
作者:M.A. Metwally、S.A. Bondock、S.I. El-Desouky、M.M. Abdou
DOI:10.5012/jkcs.2012.56.1.082
日期:2012.2.20
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 $pK_a$ 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 Z-configuration. The dyes were applied to polyester fabrics, affording orange-yellow shades and assessments of their dyeing performance are considered. Further, the compounds 4a-f were screened for their antimicrobial activity against various microorganisms.
苯肼与 2,3,4-二氢色原酮-3-芳基肼 2a-f 发生区域选择性反应,合成了新型偶氮吡唑啉-5-酮染料 4a-f。所制备系列的酸解离常数 $pK_a$是通过 Hammett 方程测定和关联的。这种相关性的结果以及光谱数据表明,所研究的化合物主要以腙酮结构(D)作为 Z 构型存在。将这些染料应用于涤纶织物,可产生橙黄色色调,并对其染色性能进行了评估。此外,还筛选了 4a-f 化合物对各种微生物的抗菌活性。