T. Nishiwaki et al., 4-SUBSTITUTED 5-AMINO-1-METHYL-3-TRIFLUOROMETHYLPYRAZOLES - STRUCTURAL DETERMINATION BY MEANS OF C-13 NUCLEAR-MAGNETIC-RESONANCE SPECTROMETRY, Journal of chemical research. Synopses, (5), 1995, pp. 198-199
Regioselective formation of 5-amino-4-aryl-1-methyl-3-trifluoromethylp
yrazoles from 3-oxo-2-aryl-4,4,4-trifluorobutane-nitrile and methylhyd
razine was confirmed by C-13 NMR spectrometry.