Synthesis and Characterization of Ethyl 4-bromo-4,4-dinitrobutyrate

Ethyl 4-bromo-4,4-dinitrobutyrate was synthesized by Michael addition reaction of bromodinitromethane potassium salt with ethyl acrylate,and the effect of the ratio of raw materials,reaction temperature and time on the yield of the target product was studied through a single factor experiment.The optimum synthesis conditions with a yield of 52% are:molar ratio 2∶1 of ethyl acrylate to bromodinitromethane potassium salt,reaction temperature 30 ℃,reaction time 30 min,and TBAB as phase transfer catalyst.The quantity of TBAB is equivalent to 20% of bromodinitromethane potassium salt.The structure of the product ethyl 4-bromo-4,4-dinitrobutanoate was identified by means of IR,1HNMR,UV-vis,MS and elemental analysis.