Ethyl 3-hydrazino-3-oxopropionate may be used in the following studies:As starting reagent in the step-wise construction of complex pyrrole-pyrazole system.,Synthesis of 4,5-dihydro-1H-pyrazoles, via reaction with 4-alkoxy-1,1,1-trifluoro-3-alken-2-ones, using conventional thermal heating method and a microwave-assisted method.Synthesis of pyrazolopyridazine.