A facile and efficient N-tert-Boc protection of amines is described by the reaction of various primary, secondary, benzylic and aryl amines with di-tert-butyl dicarbonate in the ionic liquid [TPA][Pro] at room temperature. All the N-tert-butylcarbamates are afforded in excellent yields. A catalyst-free method was developed and the ionic liquid [TPA][Pro] can be recovered and reused for several times without loss of its activity.
本文描述了一种简便高效的
胺类N-tert-Boc保护方法,采用各种初级、次级、苄基和芳基胺与二叔丁基二
碳酸酯在
离子液体[
TPA][Pro]中于室温下反应。所有N-tert-
丁基氨基甲酸酯均以优异的收率得到。开发了一种无催化剂的方法,并且
离子液体[
TPA][Pro]可以回收重复使用多次而不失去其活性。