In Situ Synthesis of CuN
<sub>4</sub>
/Mesoporous N‐Doped Carbon for Selective Oxidative Crosscoupling of Terminal Alkynes under Mild Conditions
作者:Yuanteng Zhang、Yong Wu、Yaqiong Su、Yue Cao、Zhenjin Liang、Dali Yang、Ruohan Yu、Dongchao Zhang、Jinsong Wu、Wei Xiao、Aiwen Lei、Dong Gu
DOI:10.1002/smll.202105178
日期:2022.3
crosscoupling of terminal alkynes is an efficient chemical process for manufacturing asymmetrical 1,3-conjugated diynes. However, it often occurs in homogenous conditions and costs a lot for reaction treatment. Herein, a copper catalyzed strategy is used to synthesize highly ordered mesoporous nitrogen-doped carbon material (OMNC), and the copper species is in situ transformed into the copper single-atom
1,3-共轭二炔是一类重要的化学中间体,末端炔烃的选择性交叉偶联是制备不对称1,3-共轭二炔的有效化学工艺。然而,它经常发生在均质条件下,反应处理成本很高。本文采用铜催化合成高度有序的介孔氮掺杂碳材料(OMNC),将铜物种原位转化为具有四氮配位的铜单原子位点(CuN 4)。这些特性使 CuN 4/OMNC 催化剂在温和条件 (40 °C) 和低底物比 (1.3) 下有效用于末端炔烃的选择性氧化交叉偶联,以及广泛的不对称和对称 1,3-二炔(26 个实例)。密度泛函理论 (DFT) 计算表明芳基-烷基交叉偶联在 CuN 4位点具有最低的能垒,这可以解释高选择性。此外,催化剂可以通过简单的离心或过滤分离和重复使用。这项工作可以为构建单原子负载的介孔材料以桥接均相和多相催化开辟一条简便的途径。