Dual vicinal functionalisation of heterocycles <i>via</i> an interrupted Pummerer coupling/[3,3]-sigmatropic rearrangement cascade
作者:Mindaugas Šiaučiulis、Selma Sapmaz、Alexander P. Pulis、David J. Procter
DOI:10.1039/c7sc04723a
日期:——
substituted indoles. The reaction operates under mild, metal free conditions and without directing groups, via an interrupted Pummerer coupling of activated allyl sulfoxides, generating allyl heteroaryl sulfonium salts that are predisposed to a charge accelerated [3,3]-sigmatropic rearrangement.
描述了双邻位官能化级联反应,涉及杂环和烯丙基亚砜的结合。特别是,该方法提供了有效的一步法获取生物学上相关且在合成上很重要的C3硫,C2碳取代的吲哚。该反应通过活化的烯丙基亚砜的间断Pummerer偶合,在温和,无金属的条件下进行,且没有任何导向基团,生成烯丙基杂芳基sulf盐,这些盐易于发生电荷加速的[3,3]-σ重排。