High pressure nucleophilic fluoride-ion substitution reactions: formation of fluoroalkylbenzenes
作者:John M. Gerdes、Robert N. Keil、Alexander T. Shulgin、Chester A. Mathis
DOI:10.1016/0022-1139(96)03417-3
日期:1996.6
kbar or 1 bar pressures. The resultant substitution and elimination reaction product distributions were analyzed. The application of pressure enhanced the progress of the fluoride-ion substitution reactions. The degree of selectivity of the one reaction over the other was found to be a function of tosylate substrate structure and the amount of pressure applied. The exclusive formation of fluoroalkanes
合成了一系列的1-苯基-2-甲苯磺酰氧基和1-苯基-3-甲苯磺酰氧基烷烃,然后在15 kbar(1.5 GPa),8 kbar或1 bar的压力下在THF中进行氟化四丁基铵的处理。分析了所得的取代和消除反应产物的分布。施加压力增强了氟离子取代反应的进程。发现一个反应相对于另一个反应的选择性程度是甲苯磺酸酯底物结构和所施加压力量的函数。在15 kbar压力下由1-苯基-2-甲苯磺酰氧基烷烃底物独家形成氟烷烃,表明压力法有望用于氟18放射性标记应用。