(CF3-HOBt) 11, and 6-nitro-1H-benzo(d)(1,2,3)triazol- 1-ol (NO2-HOBt) 12 with morpholine and piperidine in CH3CN underwent acyl nucleophilic substitution to give the corresponding carboxamide derivatives. The reactants and products were identified by elemental analysis, IR and NMR. We measured the kinetics of these reactions spectrophotometrically in CH3CN at a range of temperatures. The rates of morpholinolysis
HOBt) 10, 6-(trifluoromethyl)-1H-benzo(d)(1,2,3)triazol-1-ol (
CF3-
HOBt) 11, 6-nitro-1H-benzo(d)(1,2) ,3) 三唑- 1-醇 (
NO2-
HOBt) 12 与吗啉和
哌啶在 CH3CN 中进行酰基亲核取代得到相应的甲酰胺衍
生物。通过元素分析、IR 和 NMR 鉴定反应物和产物。我们在一定温度范围内用分光光度法在 CH3CN 中测量了这些反应的动力学。发现吗啉解和
哌啶解的速率符合 Hammett 方程并与 σ-Hammett 值相关。取决于温度,吗啉解的值为 1.44 - 1.21,
哌啶解的值为 1.95 - 1.72。Bronsted 型图呈线性,βlg = -0.49 ± 0.02 和 -0.67 ± 0.03。动力学数据和构效关系表明9-12与胺的反应是通过协同机制进行的。相关性 ΔH # 与