Palladium-Catalyzed Double C–H Arylation Reaction: Tandem Synthesis of Benzo[a]imidazo[5,1,2-cd]indolizines from Imidazo[1,2-a]pyridines and o-Dihaloarenes
作者:Jinsong Peng、Hanyang Wang、Chunxia Chen、Zhangjie Huang、Liping Yao、Bin Li
DOI:10.1055/s-0034-1380865
日期:——
Abstract A palladium-catalyzed direct arylation of 2-arylimidazo[1,2-a]pyridines with o-dihaloarenes via double C–H activation is described. The process comprises intermolecular C3-arylation of 2-arylimidazo[1,2-a]pyridines followed by an intramolecular C5-arylation in a highly regioselective fashion, affording benzo[a]imidazo[5,1,2-cd]indolizine derivatives in moderate to good yields. A palladium-catalyzed
摘要 2芳基咪唑的钯-催化的芳基化直接[1,2一]吡啶与ö -dihaloarenes经由双C-H活化进行说明。该方法包括2-芳基咪唑并[1,2- a ]吡啶的分子间C3-芳基化,然后以高度区域选择性的方式进行分子内C5-芳基化,得到苯并[ a ]咪唑并[5,1,2- cd ]吲哚并嗪衍生物。中等至良好的产量。 2芳基咪唑的钯-催化的芳基化直接[1,2一]吡啶与ö -dihaloarenes经由双C-H活化进行说明。该方法包括2-芳基咪唑并[1,2- a ]吡啶的分子间C3-芳基化,然后以高度区域选择性的方式进行分子内C5-芳基化,得到苯并[ a ]咪唑并[5,1,2- cd ]吲哚并嗪衍生物。中等至良好的产量。