| production method | the preparation method is obtained by chlorination of acetoacetyl diethylamine. At a temperature of 20 ℃, a certain amount of sulfuryl chloride is slowly added dropwise to acetoacetyl diethylamine, the reaction temperature is increased to 47 ℃, the reaction is continued for 20min, and the low boiling substance is distilled off with water Mercury under reduced pressure, the residue was diluted with benzene, washed with NaHCO3 and water until neutral, dried, then the solvent was removed and distilled under reduced pressure to obtain the product α,α-dichloro-N,N-diethylacetoacetamide, the yield was 85%, and the direct chlorination of chlorine could be used instead. |
