3-Amino-5-phenylpyrazole ((3-phenyl-1H-pyrazol-5-amine) may be used in the synthesis of the following: · Urea derivatives by reaction with azido(6-(benzofuran-2-yl)-2-methylpyridin-3-yl) methanone. · 2-Mercaptoacetamide analogs by treating with thioglycolic acid. · 3-(Substituentpyrimidayl)-5,6-benzocoumarins by treating with 3-(2′-formyl-1′-chlorovinyl)-5,6-benzocoumarin. · Substituted 2,7-diphenylpyrazolo[1,5-a]pyrimidine-5-carboxylic esters by reacting with substituted β-diketo esters. · N-ethoxycarbonylthiourea derivative by reacting with ethoxycarbonyl isothiocyanate. · Heterobiaryl pyrazolo[3,4-b]pyridines by reacting with indole-3-carboxaldehyde.