文献类型：期刊文献

英文题名：Continuous microflow visible-light photocatalytic N -formylation of piperidine and its kinetic study

作者：Xu, Yangyang[1];Zhao, Fang[1];Guo, Xuhong[1,2]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]Int Joint Res Ctr Green Energy Chem Engn, Shanghai 200237, Peoples R China

年份：2024

卷号：35

期号：1

外文期刊名：CHINESE CHEMICAL LETTERS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:001110164800001)】；

基金：We gratefully thank the financial support from the National Natural Science Foundation of China (No. 21808059) and the Fundamental Research Funds for the Central Universities (No. JKA01221712) .

语种：英文

外文关键词：Microflow; Visible-light photocatalysis; N-Formylation; Piperidine; Kinetics

摘要：N -formylation of amines, a class of synthetically important reactions, is typically conducted using metal catalysts that are relatively expensive or not readily available and usually needs harsh conditions to increase the reaction efficiency. Here, an efficient continuous microflow strategy was developed for the gasliquid visible-light photocatalytic N -formylation of piperidine, which achieved a reaction yield of 82.97% and a selectivity of > 99% at 12 min using cheap organic dye photocatalyst under mild reaction conditions. The influence of essential parameters, including light intensity, temperature and equivalents of the gas, additive and photocatalyst, on the reaction yield was systematically studied. Furthermore, kinetic investigations were conducted, exhibiting the dependence of reaction rate and equilibrium yield of N -formylpiperidine on light intensity, temperature and photocatalyst equivalent. The microflow photocatalytic approach established in this work, which realized a markedly higher space-time yield than the conventional batch method (37.9 vs. 0.212 mmol h -1 L -1 ), paves the way for the continuous, green and efficient synthesis of N -formamides. (c) 2023 Published by Elsevier B.V. on behalf of Chinese Chemical Society and Institute of Materia Medica, Chinese Academy of Medical Sciences.