Transition-Metal-Free Oxidative Cross-Coupling of Triorganoindium Reagents with Tetrahydroisoquinolines
作者:José M. Gil-Negrete、José Pérez Sestelo、Luis A. Sarandeses
DOI:10.1021/acs.joc.9b00928
日期:2019.8.2
proceeds in good yields at rt using 50 mol % R3In with a variety of organic groups. 1H NMR studies show the generation of an iminium ion intermediate, supporting a two-step mechanism based on THIQ oxidation and R3In nucleophilic addition. This reaction was applied to the synthesis of the alkaloid nuciferine in three steps.
三有机铟试剂(R 3 In)在作为氧化剂的Ph 3 CBF 4存在下与四氢异喹啉(THIQ)反应,得到1-取代的THIQ。使用具有各种有机基团的50 mol%R 3 In,该反应在室温下以良好的产率进行。1 H NMR研究表明生成了亚胺离子中间体,该中间体支持基于THIQ氧化和亲核加成中的R 3的两步机理。通过三个步骤将该反应应用于生物碱生物碱的合成。