Palladium-Catalyzed Synthesis of 4-Arylcoumarins Using Triarylbismuth Compounds as Atom-Efficient Multicoupling Organometallic Nucleophiles
作者:Maddali L. N. Rao、Varadhachari Venkatesh、Deepak N. Jadhav
DOI:10.1002/ejoc.201000134
日期:——
Triarylbismuth compounds have been cross-coupled as atom-efficient multicoupling organometallic nucleophiles with 4-bromo- and 4-(trifluoromethylsulfonyloxy)coumarins under palladium catalysis conditions. These reactions afforded an array of 4-arylcoumarins in high yields. The general palladium protocol has been demonstrated to be efficient for the coupling of both bromide and triflate derivatives
在
钯催化条件下,三芳基
铋化合物作为原子高效多偶联有机
金属亲核试剂与 4-
溴和 4-(三
氟甲基磺酰氧基)
香豆素交叉偶联。这些反应以高产率提供了一系列 4-芳基
香豆素。通用
钯方案已被证明对于
香豆素的
溴化物和
三氟甲磺酸酯衍
生物与三芳基
铋试剂的偶联是有效的。