A simple and efficient synthesis of benzofuroquinolines via the decarboxylative cross-coupling
作者:Praveen Kumar Rathod、Sowmya Jonnalagadda、Leelavathi Panaganti
DOI:10.1016/j.tetlet.2020.152808
日期:2021.3
An efficient and simple synthesis of benzofuroquinoline derivatives, a biologically important condensed heterocyclic system is presented. A range of benzofuro[2.3-b]quinolines were accessed by applying palladium-catalysed decarboxylative cyclisation from 2-(2- haloaryloxy)quinoline-3-carboxylic acids, which in turn are effortlessly obtained from 2-chloro-3-formylquinolines by nucleophilic substitution
提出了一种高效简单的苯并呋喃喹啉衍生物的合成方法,该衍生物是生物学上重要的稠合杂环系统。通过应用钯催化的2-(2-卤代芳氧基)喹啉-3-羧酸的钯脱羧环化反应,可以得到一系列的苯并呋喃[2.3- b ]喹啉,而后者又可以通过亲核反应轻松地从2-氯-3-甲酰基喹啉中获得用各种2-卤代戊烯醇取代并随后氧化。该策略的主要特点是底物范围广,产量高,步骤简单。