A variety of mono- and disubstituted phenols are alkylated with propargyl bromide to give phenyl 2-propynyl ethers, which were further coupled with aryliodides under Sonogashira reaction conditions to give 3-phenoxy-1-aryl-1-propyne derivatives. The latter compounds underwent an initial Claisen rearrangement followed by ring closure to give functionalized benzo[b]furans in moderate to good yields
用炔丙基溴将各种单取代和二取代的苯酚烷基化,得到苯基2-丙炔基醚,然后在Sonogashira反应条件下将其与芳基碘化物偶合,得到3-苯氧基-1-芳基-1-丙炔衍生物。后面的化合物先进行克莱森重排,然后闭环,以中等至良好的收率得到官能化的苯并[ b ]呋喃。
Cu-catalyzed intramolecular hydroarylation of alkynes
An efficient Cu-catalyzed intramolecular hydroarylation reaction of alkynes has been developed. The reaction is accomplished under mild conditions and shows good tolerance to both electron-rich and electron-deficient aryl nucleophiles. A series of aryl, heteroaryl, alkyl, and even N-group attached alkynes are all suitable substrates for the intramolecular hydroarylation.
我们开发了一种高效的铜催化炔烃分子内加氢反应。该反应在温和的条件下完成,对富电子和缺电子的芳基亲核物都有很好的耐受性。一系列芳基、杂芳基、烷基甚至 N 基团连接的炔烃都是分子内加氢反应的合适底物。