文献类型：期刊文献

英文题名：Crown Ether as Organocatalyst for Reductive Upgrading of Co2 to N-Containing Benzoheterocyclics and N-Formamides

作者：Yao, Ruxu[1,2]; Chen, Jinzhu[2]; Xu, Yisheng[1]

机构：[1] State Key Laboratory of Chemical Engineering, International Joint Research Center of Green Energy Chemical Engineering, East China University of Science and Technology, Shanghai, 200237, China; [2] College of Chemistry and Materials Science, Guangdong Provincial Key Laboratory of Functional Supramolecular Coordination Materials and Applications, Jinan University, Guangzhou, 511443, China

年份：2022

外文期刊名：SSRN

收录：EI(收录号：20220411385)

语种：英文

外文关键词：Amides - Catalysis - Catalyst activity - Crown ethers - Ethers - Ligands - Silicon - Silicon compounds - Transition metals

摘要：Constructions of heterocyclics by incorporation of CO2 into N-, O- and S-nucleophiles represent advance of synthetic methodology by using CO2 as a C1 feedstock. Herein, we reported the first work on crown ether (e.g. 18-crown-6)-catalyzed reductive functionalization of CO2 to various N-containing benzoheterocyclics and N-formamides in the presence of PhSiH3 under metal-free and mild conditions. Lewis acid-base interaction between PhSiH3 and 18-crown-6 enhanced hydride-donating ability of the PhSiH3, thus facilitating the CO2 insertion into the Si-H bond. A positive correlation was observed between electron-donating ability and catalytic activity of the investigated crown ethers on CO2 reduction. Crown ethers thus represent a novel organocatalytic activation model for CO2 reduction, providing an important alternative for transition-metal-based catalysts. ? 2022, The Authors. All rights reserved.