A conceptually new amination method of alcohols has been developed using α-hydroxy esters as substrates and N-phenyl bis-trifluoromethanesulfonimide (PhNTf2) as a test reagent. Playing two roles at once, PhNTf2 activates the hydroxyl group as a highly reactive triflate intermediate and introduces the amino functionality through an in situ nucleophilic substitution by the anionic residue PhTfN-. Two complementary procedures (methods A and B herein) have been developed, the latter permitting reaction of substrates with unstable alcoxides.
使用α-羟基酯作为底物和N-苯基双三
氟甲磺
酰亚胺(PhNTf2)作为测试试剂,开发了一种概念上新的醇胺化方法。 PhNTf2 同时发挥两个作用,作为高反应性
三氟甲磺酸酯中间体激活羟基,并通过阴离子残基 PhTfN- 的原位亲核取代引入
氨基官能团。已经开发了两种补充程序(本文中的方法A和B),后者允许底物与不稳定的醇盐反应。