electrocatalysis strategy for the catalytic dehydrochlorination of DCE at the cathode simultaneously with anodic oxidative aromatic chlorination using the released HCl as the chloride source for the efficient synthesis of value‐added (hetero)arylchlorides. The mildness and practicality of the protocol was further demonstrated by the efficient late‐stage chlorination of bioactive molecules.
Phase‐Transfer Catalysis for Electrochemical Chlorination and Nitration of Arenes
作者:Yingdong Duan、Sanzhong Luo
DOI:10.1002/anie.202319206
日期:2024.4.22
A unique biphasic electrochemical reaction, wherein tetrabutylammonium (TBA+) salts play a dual role as both electrolyte and phasetransfer catalysts, was developed to furnish chlorination and nitration of aromaticcompoundsusing cheap inorganic salts with up to 98 % yield, shorter reaction time and higher Faradaic efficiency.
chlorine radicals. In this study, we report a photoelectrochemical (PEC) strategy for achieving controlled non-radical chlorine activation on hematite (α-Fe2O3) photoanodes. High selectivity (up to 99%) and faradaic efficiency (up to 90%) are achieved for the chlorination of a wide range of aromatic compounds and alkenes by using NaCl as the chlorine source, which is distinct from conventional TiO2 photoanodes
光(电)催化氯氧化已成为化学转化和环境修复的有用方法。然而,由于氯自由基的高活性和非选择性特性,反应选择性通常较低。在这项研究中,我们报告了一种光电化学(PEC)策略,用于在赤铁矿(α-Fe 2 O 3 )光电阳极上实现受控的非自由基氯活化。与传统的TiO 2光阳极不同,使用NaCl作为氯源,对多种芳香族化合物和烯烃的氯化实现了高选择性(高达99%)和法拉第效率(高达90%)。一项全面的 PEC 研究验证了非自由基“Cl + ”形成途径,该途径是通过 α-Fe 2 O 3表面上表面捕获空穴的积累而促进的。对半导体光电化学非自由基Cl-活化的新认识有望为进行选择性氯原子转移反应提供指导。