A simple and efficient protocol was developed for the preparation of challenging α-aryl primary amides. This metal-free coupling process was triggered by TfOH-promoted electrophilic activation of α-silyl nitrile to generate keteniminium ion species, followed by reaction with aryl sulfoxide through [3,3]-sigmatrophic rearrangement to provide the target product. To the best of our knowledge, α-silyl
开发了一种简单有效的方案来制备具有挑战性的 α-芳基伯酰胺。这种无
金属偶联过程是由 TfOH 促进的 α-甲
硅烷基腈的亲电活化以产生 keteniminium 离子物质引发的,然后通过 [3,3]-σ 重排与芳基亚砜反应以提供目标产物。据我们所知,α-甲
硅烷基腈很少用作亲电子试剂。计算研究证实了高度亲电的酮
亚胺中间体的短暂存在。