Abstract A series of new 3-(aminomethyl) pyrazoles and 3-(aminomethyl) isoxazoles was synthesized along a route involving the formation as key intermediates of esters of 5- substituted 1 H-pyrazole-3-carboxylic and 1 H-isoxazole-3-carboxylic acids. All compounds obtained were characterized by physicochemical constants, IR, 1 H, 13 C NMR, and mass spectra.