Xie Jian-wei
2005
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Journal
Fine Chemical Intermediates
Abstract
N-ethyl-2,3-dioxopiperazine was synthesized from N-ethylethylenediamine and diethyl ethanedioate by condensation reaction with catalyst ammonia chloride .The effects of mole ratios , reaction time, temperature and the amount of catalyst on the yields of N-ethyl-2,3-dioxopiperazine were investigated .The optimal condition was as follows:w(cat)=1.5%(N-alkylethylenediamin),n(diethylethanedioate):n(N-alkylethylenediamine)=1.02∶1,reaction temperature 20℃,ethanol zooml,The yield of N-ethy1-2,3-dioxopipevazine was more than 85%?