Facile Synthesis of Multisubstituted Benzo[<i>b</i>]furans via 2,3-Disubstituted 6,7-Furanobenzynes Generated from <i>ortho</i>-Iodoaryl Triflate-type Precursors
作者:Takamoto Morita、Yoshitake Nishiyama、Suguru Yoshida、Takamitsu Hosoya
DOI:10.1246/cl.160951
日期:2017.1.5
a highly regioselective manner. Since a variety of precursors were easily synthesizable from readily available 2,3-disubstituted 6-hydroxybenzofurans, this method enabled facile synthesis of a wide range of multisubstituted benzofurans, including π-extended molecules.
使用甲硅烷基甲基格氏试剂作为活化剂,从邻碘芳基三氟甲磺酸酯型前体有效生成 2,3-二取代的 6,7-呋喃苯乙炔。6,7-呋喃苯乙炔和不对称亲芳体之间的反应以高度区域选择性的方式进行。由于各种前体很容易从容易获得的 2,3-二取代 6-羟基苯并呋喃合成,该方法能够轻松合成多种多取代苯并呋喃,包括 π 扩展分子。