and Cy*Phine-nBu), demonstrated exceptional broad-based performance and operational simplicity in the copper-free Sonogashira cross-coupling of challenging (hetero-)aryl chlorides and terminal alkynes. Modifications to the periphery of the ligand scaffold showed modest improvements in the reaction rate when more electron-donating substituents were incorporated, which hints at potential design upgrades
利用演化的间-叔芳基
膦配体Cy * Phine的不同变异,开发了三种新颖的
钯配合物。这些空气和
水分稳定的配合物PdCl 2 L 2(L = Cy * Phine,Cy * Phine-CF 3和Cy * Phine- n Bu)在无
铜Sonogashira中表现出优异的广泛性能和操作简便性具有挑战性的(杂)芳基
氯化物和末端
炔烃的交叉偶联。当引入更多的供电子取代基时,对
配体支架外围的修饰显示出反应速率的适度提高,这暗示了未来潜在的设计升级。