Pd-Catalyzed Tandem Cyclization via C–H Arylation and Acylation for the Construction of Polycyclic Scaffolds
作者:Bing Mu、Jingya Li、Dapeng Zou、Yusheng Wu、Junbiao Chang、Yangjie Wu
DOI:10.1021/acs.orglett.6b02571
日期:2016.10.21
The first Pd-catalyzed tandem cyclization of imidazo[1,2-a]pyridines with 2-chlorobenzaldehydes through C–H arylation and acylation is presented for the efficient synthesis of novel 6H-benzo[b]imidazo[5,1,2-de]quinolizin-6-ones. The direct acylation reaction proceeded smoothly without the aid of directing groups and in the presence of air as a clean and free terminal oxidant.
提出了通过C–H芳基化和酰化反应,用2-氯苯甲醛将Pd催化的咪唑并[1,2- a ]吡啶串联环化反应,以有效合成新型6 H-苯并[ b ]咪唑并[5,1,2] -德〕喹6人。直接酰化反应在没有引导基团的帮助下并且在作为清洁和游离末端氧化剂的空气存在下顺利进行。