34034-87-2

基本信息
氯代草酰乙酸二乙酯
Α-氯代草酰乙酸二乙酯
Α-氯代草酰乙酸二乙酯
A-氯代草酰乙酸二乙酯
2-氯-3-氧代琥珀酸二乙酯
2-氯-3-氧代丁二酸二乙酯
ALPHA-氯代草酰乙酸二乙酯
DiethylChlorooxalacetate>
DIETHYL 2-CHLORO-3-OXOSUCCINATE
diethyl 2-chloro-3-oxobutanedioate
Chlorooxalacetic Acid Diethyl Ester
Diethyl 2-chloro-3-oxobutane-1,4-dioate
2-CHLORO-3-OXO-SUCCINIC ACID DIETHYL ESTER
Diethyl 2-chlorooxalacetate, technical, 90%
2-Chloro-3-oxo butanedioic acid 1,4-diethyl ester
Butanedioic acid, 2-chloro-3-oxo-, 1,4-diethyl ester
制备方法

105-39-5

95-92-1

34034-87-2
将NaOtBu(96.1g,1.0mol)溶解于THF(1L)中,并将溶液冷却至0℃。在剧烈机械搅拌下,于该温度下缓慢滴加氯乙酸乙酯(107mL,1.0mol)与草酸二乙酯(136mL,1.0mol)的混合物。反应混合物在室温下搅拌过夜后,加入HCl水溶液(90mL浓盐酸与400mL水混合)。所得溶液用CH2Cl2(3×200mL)进行萃取。合并有机层,用无水Na2SO4干燥,过滤后减压浓缩。残余物通过减压蒸馏纯化(沸点范围110-140℃,压力10托)。得到产物2-氯-3-氧代丁二酸二乙酯157.6克,产率71%。1H NMR(CDCl3, 400MHz)δ= 1.31(t,J = 7.2Hz,3H),1.39(t,J = 7.2Hz,3H),4.31(q,J = 7.2Hz,2H),4.39(q,J = 7.2Hz,2H),5.46(s,1H)。
参考文献:
[1] European Journal of Medicinal Chemistry, 2018, vol. 154, p. 367 - 391
[2] Patent: CN104177296, 2017, B. Location in patent: Paragraph 0043; 0044; 0045
[3] Macromolecules, 2011, vol. 44, # 23, p. 9146 - 9154
[4] Chemische Berichte, 1910, vol. 43, p. 3529
[5] Bulletin des Societes Chimiques Belges, 1975, vol. 84, p. 341 - 360