Palladium-catalyzed cascade Heck-type cyclization and reductive aminocarbonylation for the synthesis of functionalized amides
作者:Ren-Rui Xu、Dan Wen、Xinxin Qi、Xiao-Feng Wu
DOI:10.1039/d2ob00299j
日期:——
A palladium-catalyzed Heck/carbonylative cyclization process has been explored for the synthesis of functionalized amides. By using nitroarenes as readily accessible nitrogen sources, a variety of amide products were obtained in moderate to excellent yields with good functional group compatibility. Furthermore, a late-stage modification of a natural molecule is also achieved by this protocol.
In this new procedure, amide-containing indolo[2,1-a]isoquinoline scaffolds were prepared by palladium-catalyzedcarbonylative cyclization of alkene-tethered indoles with nitroarenes. By using Mo(CO)6 as the CO source and reductant and nitroarenes as the nitrogen source, this reaction produced various amide-containing indolo[2,1-a]isoquinoline derivatives in good yields in general. Furthermore, the
在这个新程序中,含酰胺的吲哚[2,1- a ] 异喹啉支架通过钯催化的烯烃系留吲哚与硝基芳烃的羰基化环化制备。该反应以Mo(CO) 6为CO源,以硝基芳烃为还原剂,以氮源为氮源,制备了多种含酰胺的吲哚并[2,1- a ]异喹啉衍生物,收率总体较高。此外,还展示了使用该协议对生物活性分子进行后期修改。