Cross-Coupling Reactions of Indium Organometallics with 2,5-Dihalopyrimidines: Synthesis of Hyrtinadine A
作者:Ángeles Mosquera、Ricardo Riveiros、José Pérez Sestelo、Luis A. Sarandeses
DOI:10.1021/ol801393n
日期:2008.9.1
palladium-catalyzed cross-coupling reaction of triorganoindium reagents (R3In) with 5-bromo-2-chloropyrimidine proceeds chemoselectively, in good yields, to give 5-substituted-2-chloropyrimidines or 2,5-disubstituted pyrimidines using 40 or 100 mol % of R3In, respectively. Sequential cross-couplings are also performed, in one pot, using two different R3In. This method was used to achieve the first synthesis of the
三有机铟试剂(R3In)与5-溴-2-氯嘧啶的钯催化交叉偶联反应以良好的收率进行化学选择,以40或100 mol的量产生5-取代的-2-氯嘧啶或2,5-二取代的嘧啶分别为R3In的%。还可以使用两个不同的R3In在一个电位器中执行顺序交叉耦合。该方法用于完成生物碱hy碱A的首次合成。关键步骤是三(3-吲哚基)铟试剂与5-溴-2-氯嘧啶之间的两倍交叉偶联反应。