Kinetics of the ene reactions of 4-phenyl-1,2,4-triazoline-3,5-dione with β-pinene and 2-carene: Temperature, high pressure, and solvent effects
作者:Vladimir D. Kiselev、Dmitry A. Kornilov、Oleg V. Anikin、Alexey A. Shulyatiev、Anastasia O. Kolesnikova、Alexander I. Konovalov
DOI:10.1002/kin.21189
日期:2018.9
The data on temperature, solvent, and high hydrostatic pressure influence on the rate of the ene reactions of 4‐phenyl‐1,2,4‐triazoline‐3,5‐dione (1) with 2‐carene (2), and β‐pinene (4) have been obtained. Ene reactions 1+2 and 1+4 have high heat effects: ∆Hr‐n (1+2) −158.4, ∆Hr‐n(1+4) −159.2 kJ mol−1, 25°C, 1,2‐dichloroethane. The comparison of the activation volume (∆V≠(1+2) −29.9 cm3 mol−1, toluene;
温度,溶剂和高静水压的数据对4-苯基-1,2,4-三唑啉-3,5-二酮(1)与2-烯丙基(2)和β的烯反应速率的影响已获得pine烯(4)。烯反应1 + 2和1 + 4具有高的热效应:Δ ħ - [R - Ñ(1 + 2)-158.4,Δ ħ - [R - Ñ(1 + 4)-159.2千焦摩尔-1,25℃,1, 2-二氯乙烷 激活量的比较(∆ V ≠(1 + 2)-29.9cm 3 mol -1,甲苯;Δ V ≠(1 + 4)-36.0厘米3摩尔-1,乙酸乙酯)和反应体积值(Δ V R-N (1 + 2)-24.0厘米3摩尔-1,甲苯;Δ V R-N (1 + 4)-30.4 cm 3 mol -1(乙酸乙酯)与无环反应产物3和5。在这九种溶剂系列中,1 + 2的反应速率分别增加260倍和1 + 4的反应速率增加200倍,但这不是由于溶剂极性。