Palladium-Catalyzed Oxidative Cyclocarbonylation of Isoquinolones with CO via C−H/N−H Bond Cleavage: Easy Access to Isoindolo[2,1-<i>b</i>
]isoquinoline-5,7-dione Derivatives
作者:Shenghai Guo、Fang Wang、Lincong Sun、Xinying Zhang、Xuesen Fan
DOI:10.1002/adsc.201800347
日期:2018.7.4
An efficient and practical synthesis of isoindolo[2,1‐b]isoquinoline‐5,7‐diones through Pd‐catalyzed C−H activation/carbonylative annulation of isoquinolones with CO (1 atm) is presented. Deuterium‐labeling experiments revealed that the aryl C(sp2)−H bond activation might be the rate‐determining step. More interestingly, the title compounds could also be prepared directly from the cascade reaction
提出了一种通过Pd催化的CH活化/异喹啉酮与CO(1 atm)羰基环化反应有效合成异吲哚并[2,1 – b ]异喹啉-5,7-二酮的方法。氘标记实验表明,芳基C(sp 2)-H键的活化可能是决定速率的步骤。更有趣的是,标题化合物也可以直接由N-甲氧基苯甲酰胺和内部炔烃(作为异喹诺酮的前体)在一氧化碳的大气压下,通过Rh / Pd中继催化,以用户友好的方式级联反应制备。。