26.  Azoic Compounds Obtained from 1H-4-ethoxycarbonyl-3-methyl-5- aminopyrazole and 1,3-disubstituted 1H-pyrazol-5-ones

Authors: S.V. Nitu, V.N. Bercean, V. Badea, C. Csunderlik


Abstract:

The coupling of 1H-4-ethoxycarbonyl-3-methyl-pyrazol-5-yl-diazonium chloride (2) with 1H-1,3-disubstituted-5-pyrazolones (3), was performed in water-alcoholic solution, in the presence of sodium acetate and gave the corresponding 1,3-disubstituted 1H-4-(1H-4-ethoxycarbonyl-3-methyl-pyrazol-5-yl)azo-5-pyrazolones (4). The structure of the new azo dyes was confirmed by IR, VIS and NMR spectroscopy.


Keywords: azoic compounds, 1H-4-ethoxycarbonyl-3-methyl-pyrazol-5-yl-diazonium chloride, 1H-1,3-disubstituted-4- (1H-4-ethoxycarbonyl-3-methyl-pyrazol-5-yl)azo-5-pyrazolones

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