Various substituted 1,3‐thiazolidin‐2‐ones can be synthesized by using a tBuOK‐mediated carbonylativecyclization of propargylicamines with elemental sulfur. Benzene‐1,3,5‐triyl triformate (TFBen) serves as a convenient CO surrogate.
We report here a new carbonylative procedure for the cyclization of propargylicamines with elemental selenium (Se). By using tBuOK as the promoter, various 1,3‐selenazolidin‐2‐ones were produced without the usage of toxic CO gas. Benzene‐1,3,5‐triyl triformate (TFBen) was employed as a safe and convenient CO surrogate here, and a broad class of substrates (29 examples) were effectively transformed
Binuclear Tridentate Hemilabile Copper(I) Catalysts for Utilization of CO<sub>2</sub> into Oxazolidinones from Propargylic Amines
作者:Fei Chen、Sheng Tao、Qian-Qian Deng、Donghui Wei、Ning Liu、Bin Dai
DOI:10.1021/acs.joc.0c02065
日期:2020.12.4
Four binuclear tridentate copper(I) complexes were synthesized based on the trans effect of the hybrid ligands. The catalytic performance and behavior of the prepared copper(I) complexes were evaluated in the carboxylative cyclization of propargylic amines with CO2. The combined use of copper(I) complexes and 1,5,7-triazabicyclo[4.4.0]dec-5-ene (TBD) provided a catalytic system for the synthesis of
基于杂合配体的反式作用,合成了四种双核三齿铜(I)配合物。制备的铜(I)配合物的催化性能和行为在炔丙基胺与CO 2的羧基环化反应中进行了评估。铜(I)配合物和1,5,7-三氮杂双环[4.4.0] dec-5-ene(TBD)的组合使用为从各种炔丙基胺和CO 2合成各种恶唑烷酮提供了催化体系在温和的反应条件下(室温—40°C和1 bar CO 2)。该协议成功的关键因素是使用具有N-杂环卡宾和氮供体之间具有半不稳定性质的铜配合物。NMR测量,密度泛函理论(DFT)计算以及有关镍配合物配位行为的先前报道均支持N-杂环卡宾与氮供体之间反式作用的存在。
Cyanuric Acid-Based Organocatalyst for Utilization of Carbon Dioxide at Atmospheric Pressure
作者:Bing Yu、Daeun Kim、Seoksun Kim、Soon Hyeok Hong
DOI:10.1002/cssc.201601684
日期:2017.3.22
economical and readily available cyanuric acid has been developed for the synthesis of 2‐oxazolidinones and quinazoline‐2,4(1H,3H)‐diones from propargylamines and 2‐aminobenzonitriles under atmospheric pressure carbondioxide. Notably, a low concentration of carbondioxide in air was directly converted into 2‐oxazolidinone in excellent yields without an external base. Through mechanistic investigation by in situ
Convenient Carbonylative Synthesis of Selenium-Substituted Vinyl Iodides: (<i>E</i>
)-5-(Iodomethylene)-1,3-selenazolidin-2-ones
作者:Hai Wang、Jun Ying、Han-Jun Ai、Xiao-Feng Wu
DOI:10.1002/ejoc.201801737
日期:2019.2.21
straightforward carbonylation procedure toward (E)‐5‐(iodomethylene)‐1,3‐selenazolidin‐2‐ones has been established for the first time. By using DBU as the promoter, propargylicamines and elemental selenium were carbonylativelycyclized with TFBen as the CO source using n‐C4F9I as the iodide source. Various desired products with broad functional groups are synthesized in up to 95 % yields under mild
首次建立了一种新的,直接的针对(E)-5-(碘亚甲基)-1,3-硒代咪唑啉-2-酮的羰基化方法。通过使用DBU作为促进剂,炔丙基胺和元素硒以TFBen作为CO源,以n- C 4 F 9 I作为碘化物源进行羰基化环化。在温和条件下,各种合成的具有宽泛官能团的所需产物的收率高达95%。