An efficient, room temperature procedure for the cross-coupling of a range of terminal alkynes, using standard Sonogashira cross-coupling conditions (Pd/Cu) is presented. At higher reaction temperatures, head-to-tail or head-to-head dimerisation affords 1,3- and 1,4-disubstituted enynes, respectively as minor products.
提出了一种高效的室温程序,用于一系列末端
炔烃的交叉耦合,采用了标准的Sonogashira交叉耦合条件(Pd/Cu)。在较高的反应温度下,头对尾或头对头的二聚反应分别产生1,3-和1,4-二取代的烯炔作为次要产物。