Unified Approach to the Chemoselective α-Functionalization of Amides with Heteroatom Nucleophiles
作者:Carlos R. Gonçalves、Miran Lemmerer、Christopher J. Teskey、Pauline Adler、Daniel Kaiser、Boris Maryasin、Leticia González、Nuno Maulide
DOI:10.1021/jacs.9b06956
日期:2019.11.20
electronegative than carbon requires an oxidation event. Herein we show that, by rendering the α-position of amides electrophilic through a mild and chemoselective umpolung transformation, a broad range of widely available oxygen, nitrogen, sulfur, and halogen nucleophiles can be used to generate α-functionalized amides. More than 60 examples are presented to establish the generality of this process, and calculations
羰基化合物 α 位的官能化通常依赖于烯醇化学。结果,新的 C-X 键的产生需要一个氧化事件,其中 X 比碳更具电负性。在本文中,我们表明,通过温和且化学选择性的 umpolung 转化使酰胺的 α 位具有亲电性,广泛可用的氧、氮、硫和卤素亲核试剂可用于生成 α 功能化酰胺。提供了 60 多个示例来确定该过程的一般性,并且机械方面的计算强调了解释该方法广泛性的碎片化途径。