“…In our hands, reaction of 6c with 3-amino-1,2,4-triazole, in ethanol in the presence of a catalytic amount of piperidine under reflux, was found to be regiospecific as it afforded only one product that was identified as 5-(4-benzoyl-1,5-diphenyl-1H-pyrazol-3-yl)-1,2,4-triazolo[1,5-a]pyrimidine 9 on the basis of its spectral data and elemental analysis. For example, its 1 H NMR spectrum revealed a one proton singlet at δ 8.46 and two doublet signals, each for one proton, at δ 7.58 and 8.84 with J = 4.5 Hz assignable to the H-2, H-6 and H-7 protons of the 1,2,4-triazolo [1,5-a]pyrimidine moiety, respectively. [13][14][15][16][17] The chemical shift value (δ 8.46) fully confirms that the condensation of 6c with 3-amino-1,2,4-triazole provides…”