通过金与芳氧基乙炔和芳基炔丙基醚的蒽环金环氧化反应,可直接获得苯并呋喃[2,3- b ]喹啉和6 H -chromeno [3,4- b ]喹啉核
摘要:
这项工作报告了蒽与芳氧基乙炔或芳基炔丙基醚的轻松环合,分别构建有用的苯并呋喃[2,3- b ]喹啉和6 H- chromeno [3,4- b ]喹啉骨架。尽管这些杂环具有生物学意义,但仍不易从文献方法中获得。广泛的基材范围突出了这种高原子经济和阶梯经济的策略。提出通过α-亚氨基金卡宾中间体的氧芳基,金卡宾和苯甲醛之间的顺序环化来进行反应机理。
metal-free approach for the synthesis of 3-aryl-2-substituted quinolines and 4-arylacridines has been developed via the 1,3-dipolar cycloaddition reactions of arynes with N-oxides. Reactions of various 2-substitued quinolineN-oxides with ortho-(trimethylsilyl)aryltriflates in the presence of KF gave 3-(2-hydroxyaryl)quinoline derivatives in good yields. Acridine N-oxides also reacted with arynes to