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。
Palladium-Catalyzed Regioselective Aerobic Oxidative CH/NH Carbonylation of Heteroarenes under Base-Free Conditions
作者:Hua Zhang、Dong Liu、Caiyou Chen、Chao Liu、Aiwen Lei
DOI:10.1002/chem.201101300
日期:2011.8.22
balloon pressure of CO, the direct oxidative carbonylation of various heteroarenes with different alcohols was achieved in good to high yields with air as the oxidant in the presence of PdCl2(PPh3)2 (see scheme). Notably, this transformation was carried out under base‐free conditions. The reaction showed remarkably high regioselectivity and presents an environmentally benign protocol for the synthesis
Enantioselective Dearomatization of Indoles via SmI<sub>2</sub>-Mediated Intermolecular Reductive Coupling with Ketones
作者:Wen-Yun Zhang、Hu-Chong Wang、Ye Wang、Chao Zheng、Shu-Li You
DOI:10.1021/jacs.3c01994
日期:2023.5.10
Samariumdiiodide (SmI2) mediated reductive coupling reactions are powerful methods for the construction of carbon–carbon bond in organic synthesis. Despite the extensive development in recent decades, successful examples of the corresponding asymmetric reactions remained scarce, probably due to the involvement of highly reactive radical intermediates. In this Article, we report an enantioselective