Non-Noble-Metal Metal–Organic-Framework-Catalyzed Carboxylative Cyclization of Propargylic Amines with Atmospheric Carbon Dioxide under Ambient Conditions
作者:Ai-Ling Gu、Wan-Ting Wang、Xin-Yu Cheng、Tian-Ding Hu、Zhi-Lei Wu
DOI:10.1021/acs.inorgchem.1c01776
日期:2021.9.6
clusters was synthesized and applied to this reaction. Compound 1 displays excellent solvent stability. Importantly, 1, acting as heterogeneous catalyst, can highly catalyze the cyclization of propargylic amines with CO2 under atmospheric pressure at room temperature, which can be recycled at least five times without an obvious decrease of the catalytic activity. NMR spectroscopy, coupled with 13C-isotope-
炔丙胺与二氧化碳(CO 2 )偶联反应合成2-恶唑烷酮是工业生产中的重要反应,但往往需要苛刻的反应条件和贵金属催化剂才能实现高产率。在此,合成了一种由镁和铜簇组装的新型无贵金属三维骨架[Mg 3 Cu 2 I 2 (IN) 4 (HCOO) 2 (DEF) 4 ] n ( 1 ),并将其应用于这种反应。化合物1显示出优异的溶剂稳定性。重要的是,1作为多相催化剂,在常压、常压、室温条件下,可以高度催化炔丙胺与CO 2的环化反应,可循环使用至少5次,催化活性没有明显下降。核磁共振谱,结合13 C-同位素和氘标记实验,清楚地阐明了该催化体系的机理:CO 2被成功捕获并转化为 2-恶唑烷酮的产物,炔丙胺的 C≡C 键可以1有效激活,质子转移参与反应过程。进一步进行密度泛函理论计算以揭示反应路径和化合物1的关键作用 在反应过程中。