Palladium-catalyzed coupling reactions of 4-coumarinyl triflates with indoles leading to 4-indolyl coumarins
作者:Tao Guo、Yu Liu、Yun-Hui Zhao、Pan-Ke Zhang、Shu-Lei Han、Hong-Min Liu
DOI:10.1016/j.tetlet.2016.09.012
日期:2016.10
A convenient and efficient approach for the synthesis of 4-indolyl coumarins and 4-indolyl quinolinones was developed via palladium-catalyzedcouplingreactions between 4-coumarinyl triflates/4-trifluoromethanesulfonyloxyquinolinones and indoles. Biological evaluation revealed that some of the obtained products exhibited in vitro antiproliferative activities on human-derived prostate, stomach, lung
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-efficientmulticoupling organometallic nucleophiles with 4-bromo- and 4-(trifluoromethylsulfonyloxy)coumarins underpalladiumcatalysis 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