An Efficient Method for the Preparation of Carboxamides by Dehydration Condensation Using Tetrakis(1,1,1,3,3,3-hexafluoro-2-propoxy)silane
作者:Takashi Tozawa、Yoshinobu Yamane、Teruaki Mukaiyama
DOI:10.1246/cl.2005.1586
日期:2005.12
The use of tetraalkoxysilanes, particularly tetrakis(perfluoroalkoxy)silanes, in dehydration condensation of carboxylic acids with amines was investigated. Tetrakis(1,1,1,3,3,3-hexafluoro-2-propoxy)silane, Si[OCH(CF3)2]4, prepared easily from silicon tetrachloride and sodium 1,1,1,3,3,3-hexafluoro-2-propoxide, was found to be an effective dehydrating reagent for preparing various carboxamides in good to high yields from the corresponding carboxylic acids and amines.
研究了四烷氧基硅烷,特别是四(全氟烷氧基)硅烷,在羧酸与胺脱水缩合反应中的应用。通过四氯化硅和1,1,1,3,3,3-六氟-2-丙醇钠容易制备的四(1,1,1,3,3,3-六氟-2-丙氧基)硅烷,Si[OCH(CF3)2]4,被发现是一种有效的脱水剂,能够从相应的羧酸和胺以良好至高产率制备各种羧酰胺。