Amide Activation by Tf2O: Reduction of Amides to Amines by NaBH4 under Mild Conditions
作者:Pei-Qiang Huang、Shao-Hua Xiang、Jian Xu、Hong-Qiu Yuan
DOI:10.1055/s-0030-1258111
日期:2010.7
An expeditious and practical method for the reduction of amides to amines is reported. The method is consisted of activation of amides with Tf2O followed by reduction with sodium borohydride in THF at room temperature. Various amides/lactams gave the corresponding amines in good to excellent yields, even with hindered amides and secondary amides. This method also presents other advantages such as TBDPS-group tolerance, short reaction time, simple workup and purification procedure.
报道了一种快速且实用的酰胺还原为胺的方法。该方法包括使用Tf2O对酰胺进行活化,然后在室温下用四氢呋喃中的硼氢化钠进行还原。各种酰胺/内酰胺都能以良好到优异的产率生成相应的胺,即使是对立体的酰胺和二级酰胺也如此。该方法还具有其他优点,如对TBDPS基团的耐受性、反应时间短、操作简便以及纯化过程简单。