Kinetic Study on the Reaction of<i>p</i>-Nitrophenyl Acetate with 6-Substituted 2,4-Diamino-1,3,5-triazines
作者:Takeo Konakahara、Koji Kishimoto、Hiroyuki Sato、Yasushi Takagi、Kenji Sato
DOI:10.1246/bcsj.61.4289
日期:1988.12
The reactions of p-nitrophenyl acetate (1) with six 6-substituted 2,4-diamino-1,3,5-triazines, (2a–2f), were kinetically investigated in aqueous DMSO or in water at 30 °C. It was found that the reaction rate R could be expressed according to the equation R=(k0+kN[2])[1], and that Bronsted-type plots for the kN-reaction give a straight line with a slope (β) of 1.05. The solvent deuterium isotope effect
对硝基苯乙酸酯 (1) 与六个 6-取代的 2,4-二氨基-1,3,5-三嗪 (2a–2f) 的反应在 DMSO 水溶液或 30 °C 的水中进行动力学研究。发现反应速率 R 可以根据方程 R=(k0+kN[2])[1] 表示,并且 kN 反应的布朗斯台德型图给出了一条斜率 (β) 的直线1.05。在该反应中未观察到溶剂氘同位素效应 [kN(H)⁄kN(D)=1.0–1.15]。此外,分离出的反应产物是 2-乙酰氨基-4-氨基-6-甲基-1,3,5-三嗪 (4c),它是由 2c 对 1 的亲核攻击形成的。讨论了亲核反应。