Here, we describe a transition-metal-free condition that realized the intramolecular acylfluorination of unactivated olefins. It was designed to access seven-membered-ring-containing benzo[b]annulenones from readily prepared 2-allylamino benzoic acids. The formation of a broad scope of electronically and sterically varied benzo[b]annulenones was demonstrated (>30 examples, up to 88% yield and >20:1
在这里,我们描述了一种无过渡
金属的条件,该条件实现了未活化烯烃的分子内酰基
氟化。它旨在从易于制备的 2-烯丙基
氨基
苯甲酸中获取含有七元环的苯并 [ b ] 环烯酮。证明了电子和空间变化范围广泛的苯并 [ b ] 环烯酮的形成(>30 个实例,高达 88% 的产率和 >20:1 的 dr 比率)。机理研究表明,原位形成的 XatlFluor-E 活化酸酐是活性物质,可诱导亲电子 7-内触发环化,随后是阳离子的
氟化物捕获。