Pyridazine derivatives and related compounds. 23*. Synthesis of 3-substituted pyrazolo[3,4-c]pyridazines and their application as disperse dyes
作者:A. Deeb、F. Yassin、N. Ouf、W. Shehta
DOI:10.1007/s10593-010-0494-1
日期:2010.6
Acetylacetone and malononitrile were coupled with diazotized arylamines to give arylazoacetyl-acetones and arylazomalononitriles. When refluxed with 3-hydrazino-4,5-diphenyl-1H-pyrazolo-[3,4-c]pyridazine in the presence of ethanol/HCl, they yielded the corresponding 3-[4-(arylazo)-3,5-di-methylpyrazol-1-yl]- and 3-[3,5-diamino-4-(arylazo)pyrazol-1-yl]-4,5-diphenyl-1H-pyrazolo[3,4-c]pyri-dazine dyes. The dyes were applied to polyester and polyamide fabrics, and their spectral and fastness properties were measured.
DFT, FT-IR, FT-Raman and NMR studies of 4-(substituted phenylazo)-3,5-diacetamido-1H-pyrazoles
compounds with hydrazine monohydrate. The experimental and theoretical vibrational spectra of azo dyes were studied. The structural and spectroscopic analysis of the molecules were carried out by using Becke’s three-parameters hybrid functional (B3LYP) and density functional harmonic calculations. The 1 H nuclearmagneticresonance (NMR) chemical shifts of the azo dye molecules were calculated using the g
摘要 我们详细分析了一些新型偶氮染料的结构和振动光谱。2-(取代苯基偶氮)丙二腈是通过重氮盐的偶联反应合成的,重氮盐是用各种苯胺衍生物与丙二腈制备的,然后是4-(取代苯基偶氮)-3,5-二氨基-1H-吡唑偶氮染料是通过偶氮化合物与肼一水合物的闭环获得的。研究了偶氮染料的实验和理论振动光谱。分子的结构和光谱分析是通过使用贝克的三参数混合泛函(B3LYP)和密度泛函谐波计算进行的。使用规范不变原子轨道 (GIAO) 方法计算偶氮染料分子的 1 H 核磁共振 (NMR) 化学位移。将计算的振动波数和化学位移与分子的实验数据进行比较。