α-Oxocarboxylic Acids as Three-Carbon Insertion Units for Palladium-Catalyzed Decarboxylative Cascade Synthesis of Diverse Fused Heteropolycycles
作者:Liwei Zhou、Shujia Qiao、Fengru Zhou、Xinyu Xuchen、Guobo Deng、Yuan Yang、Yun Liang
DOI:10.1021/acs.orglett.1c00493
日期:2021.4.16
A novel palladium-catalyzed decarboxylative cascade cyclization for the assembly of diverse fused heteropolycycles by employing α-oxocarboxylic acids as three-carbon insertion units is reported. This protocol enables the synthesis of isoquinolinedione- and indolo[2,1-a]isoquinolinone-fused benzocycloheptanones in moderate to good yields by the use of different aryl iodides, including alkene-tethered
报道了一种新颖的钯催化脱羧级联环化反应,该反应通过使用α-氧代羧酸作为三碳插入单元来组装各种稠合的杂多环。该方案可通过使用不同的芳基碘化物(包括烯烃系的2-碘代苯甲酰胺和2-(2-碘代苯基)-)以中等到良好的产率合成异喹啉二酮和吲哚并[2,1 - a ]异喹啉酮稠合的苯并环庚酮1 H-吲哚。值得注意的是,该方法通过依次进行分子内碳氢合,CH活化和脱羧,实现了六元环和七元环的同时构建。