Trifluoroacetolysis rates and products were determined for eleven 4-(m- and p-substituted phenyl) butyl 6-methyl-2-naphthalenesulfonates. Most substrates solvolyze predominantly or even exclusively with aryl assisted (kΔ) pathway. Dissection of kΔ into Ar1-5 and Ar2-6 components was performed by means of quantitative 13C NMR study of suitably labeled p-methyl and p-fluoro derivatives; the results were
测定了 11 种 4-(间和对取代苯基)丁基 6-甲基-
2-萘磺酸盐的三
氟乙酰化速率和产物。大多数底物主要或什至完全通过芳基辅助 (kΔ) 途径溶解。通过对适当标记的对甲基和对
氟衍
生物进行定量 13C NMR 研究,将 kΔ 分解为 Ar1-5 和 Ar2-6 组分;结果是前者为 32.4% Ar1-5 和 67.6% Ar2-6,后者为 43.3% Ar1-5 和 56.7% Ar2-6。对于其他底物,通过为由上述四个部分速率确定的两个途径假定两个独立的线性自由能关系 (LFER) 来进行解剖。在整个系列中,Ar2-6 比 Ar1-5 更受欢迎;对于未取代的衍
生物,测定了 90.6% Ar2-6 与 9.4% Ar1-5。