The conversion of ketones to esters has been achieved through the use of Cu catalyst and tetrabutylammonium nitrite. This reaction involves the activation of the less activated C-C bond, and the alkyl group is removed as a leaving group. Various isopropyl ketones are found to be good substrates for this reaction.
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.
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
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。
A General Method for Palladium-Catalyzed Direct Carbonylation of Indole with Alcohol and Phenol
作者:Rui Lang、Lijun Shi、Dengfeng Li、Chungu Xia、Fuwei Li
DOI:10.1021/ol3017726
日期:2012.8.17
A novel strategy involving a first oxidative iodination and subsequent Pd-0-catalyzed carbonylation to yield indole-3-carboxylate has been developed. It showed perfect generality to indole, alcohol, and phenol. The current methodology could also be conveniently applied to the synthesis of biologically active tropisetron from simple indole and tropine.