Catalyst‐Free Synthesis of O‐Heteroacenes by Ladderization of Fluorinated Oligophenylenes
作者:Mikhail Feofanov、Vladimir Akhmetov、Ryo Takayama、Konstantin Amsharov
DOI:10.1002/anie.202007427
日期:2021.3
substitution even in the presence of strong electron‐donating groups and enables de‐tert‐butylation required for the complete annulation. Also demonstrated is the applicability of the method to introduce five‐, six‐, and seven‐membered rings containing oxygen, whereas multiple annulations also open up a short synthetic path to ladder‐type O‐heteroacenes and oligodibenzofurans.
报道了一种新颖的无催化剂方法,用于从氟化低聚亚苯基制得苯并环氧基的含氧杂环。与现有方法不同,本发明的反应不需要含氧的前体,而是依赖于外部氧源叔丁醇钾,它可作为O 2−合成子。该反应的自由基性质即使在存在强供电子基团的情况下也能促进亲核取代,并能实现完全环化所需的叔丁基化。还证明了该方法适用于引入含氧的五元,六元和七元环,而多次环化也为阶梯型邻杂并苯和低聚二苯并呋喃开辟了一条短的合成途径。