Palladium-Catalyzed Iodine Assisted Carbonylation of Indoles with ClCF<sub>2</sub>CO<sub>2</sub>Na and Alcohols
作者:Mengting Cao、Dandan Zuo、Dan Wang、Yafei Li、Jingjing Zhao、Jiajing Tan、Pan Li
DOI:10.1021/acs.joc.4c00110
日期:2024.4.19
iodine-assisted carbonylation reaction of indoles with readily available ClCF2CO2Na and alcohols has been developed. This protocol provides a practical and efficientapproach to highly regioselective indole-3-carboxylates via a preiodination strategy of indoles. Different from classic carbonylation using toxic and difficult-to-handle carbon monoxide, this operationally simple and scalable reaction employed difluorocarbene
已经开发出钯催化的碘辅助吲哚与容易获得的ClCF 2 CO 2 Na和醇的羰基化反应。该协议通过吲哚的预碘化策略提供了一种实用且有效的方法来获得高度区域选择性的吲哚-3-羧酸盐。与使用有毒且难以处理的一氧化碳的经典羰基化不同,这种操作简单且可扩展的反应采用二氟卡宾作为羰基替代物。
Regioselective Rh-catalyzed direct carbonylation of indoles to synthesize indole-3-carboxylates
作者:Rui Lang、Junliang Wu、Lijun Shi、Chungu Xia、Fuwei Li
DOI:10.1039/c1cc15143f
日期:——
Rh-catalyzed C–H carbonylation of indoles under 1 atm of CO has been achieved. Various substituted indoles and indole with free N–H could be carboxylated with linear- and/or cyclic-alcohol to give the desired indole-3-carboxylates with up to 92% yield. A mechanism involving RhIII initiated C–H metallation is proposed.