Palladium-catalyzed cross-coupling of 2-haloselenophene with terminal alkynes in the absence of additive
作者:Olga Soares do Rêgo Barros、Alexandre Favero、Cristina W. Nogueira、Paulo H. Menezes、Gilson Zeni
DOI:10.1016/j.tetlet.2006.01.118
日期:2006.3
2-haloselenophenes with terminal alkynes catalyzed by PdCl2(PPh3)2, under co-catalyst free conditions and establish a new procedure to prepare (2-alkynyl)-selenophenes in good yields. The reaction proceeded cleanly under mild reaction conditions and was performed with propargylic alcohols, protected propargylic alcohols, propargylic amines, as well as alkyl, and aryl alkynes, in the presence of PdCl2(PPh3)2
我们在这里介绍我们的结果,在无助催化剂的条件下,PdCl 2(PPh 3)2催化2-卤代硒烯与末端炔烃的Sonogashira偶联反应,并建立了制备高产率的(2-炔基)-硒烯的新方法。该反应在温和的反应条件下进行清洁,并用炔丙醇,被保护的炔丙醇,炔丙基胺,以及烷基和芳基炔执行,在的PdCl存在2(PPH 3)2,等3N,DMF,并且在没有任何辅助添加剂的情况下。另外,通过该方案,在2锅中使用2,5-双-碘硒烯与过量的末端炔烃,还获得了(2,5-双-炔基)-硒烯。