different derivatives and depend on the substituents in the aromatic and/or heterocyclic moiety. The rate-limiting step of hydrolysis of 1-(4-nitrophenyl)pyrrolidin-2-one consists of the non-catalysed decomposition of the tetrahedral intermediate. In the case of 3-bromo-1-(4-nitrophenyl)pyrrolidin-2-one at sodium hydroxide concentrations below 0.1 mol l−1, the rate-limiting step is the second reaction pathway
对取代的4-
氯-N-苯基丁酰胺在
氢氧化钠水溶液中的
化学行为的研究表明,底物首先进行闭环反应,得到取代的
1-苯基吡咯烷二-2-酮,然后
水解为4-
钠的取代衍
生物。
氨基-N-苯基
丁酸酯。动力学测量提供了在25°C
水中2-
溴-4-
氯-N-(4-
硝基苯基)丁酰胺的解离常数p K a和环化速率常数k c的值[p K a = 11.64±0.01; k c =(1.94±0.03)×10 -2 s -1 ],4-
氯-N-(4-
硝基苯基)丁酰胺[p K a = 13.35±0.02;k c =(1.60±0.02)×10 -2 s -1 ]和4-
氯-2-甲基-N-(4-
硝基苯基)丁酰胺[p K a = 13.55±0.03;k c =(7.61±0.11)×10 -2 s -1 ]。各个衍
生物的p K a和k c值因丁酰胺骨架的α位取代而异。在
甲醇钠甲醇溶液中,2-
溴-4-
氯-N的闭环过程-(