4-Substituted 5-Amino-1-methyl-3-trifluoromethylpyrazoles: Structural Determination by Means of Carbon-13 Nuclear Magnetic Resonance Spectrometry
Regioselective formation of 5-amino-4-aryl-1-methyl-3-trifluoromethylpyrazoles from 3-oxo-2-aryl-4,4,4-trifluorobutanenitrile and methylhydrazine was confirmed by 13C NMR spectrometry.