作者:Boris Nachtsheim、Ulrich Kloeckner、Nicole Weckenmann
DOI:10.1055/s-0031-1289902
日期:2012.1
An efficient synthesis of 2-aminobenzoxazoles is described by a direct oxidative amination of unfunctionalized benzoxazoles with primary amines. The reaction could be performed in the absence of transition metals by using catalytic amounts of a quaternary ammonium iodide and tert-butylhydroperoxide as a cheap and easy-to-handle co-oxidant. In addition to primary amines, aqueous solutions of NH3 were used to introduce a primary amine group into the heterocyclic core.
报道了一种高效的2-氨基苯并噁唑合成方法,通过未官能化的苯并噁唑与伯胺直接氧化胺化实现。该反应在无需过渡金属存在的情况下,使用催化量的季铵碘盐和叔丁基过氧化氢作为廉价且易于处理的共氧化剂即可进行。除了伯胺,水溶液中的氨也被用来向杂环核心引入伯胺基团。