An iron(III)-catalyzed three-component coupling reaction of alkynes, CH(2)Cl(2) and amines was developed for facile synthesis of propargylamines. Preliminary mechanism investigation using in situ FT-IR reveals that the crucial Fe-acetylide intermediate could be formed through C-H bond activation of alkynes thanks to cooperative effect of FeCl(3) and 1,1,3,3-tetramethylguanidine.
One-Pot Multicomponent Synthesis of Allyl and Alkylamines Using a Catalytic System Composed of Ruthenium Nanoparticles on Copper <i>N</i>-Heterocyclic Carbene-Modified Silica
作者:Deepti Kalsi、Savarithai J. Louis Anandaraj、Manisha Durai、Claudia Weidenthaler、Meike Emondts、Steven P. Nolan、Alexis Bordet、Walter Leitner
DOI:10.1021/acscatal.2c04044
日期:2022.12.16
integrated one-pot synthesis of valuable allylamines and alkylamines from amines, formaldehyde, and terminal alkynes is achieved using a single catalyst material. This multifunctional catalytic system is composed of a silica support on which are jointly assembled ruthenium nanoparticles and covalently functionalized copper N-heterocyclic carbene (NHC) complexes, introducing a new generation of nanoparticles
使用单一催化剂材料实现了从胺、甲醛和末端炔烃中一锅法合成有价值的烯丙胺和烷基胺。这种多功能催化系统由二氧化硅载体组成,在其上共同组装了钌纳米粒子和共价功能化的铜N-杂环卡宾 (NHC) 配合物,引入了新一代固定在分子修饰表面上的纳米粒子。通过多种技术研究了所得 Ru@SiO 2 -[Cu-NHC] 材料的结构、结构、形态和电子特性,包括 N 2吸附、固态核磁共振、电子显微镜和 X 射线光电子能谱. Ru@SiO 2-[Cu-NHC] 被发现对一系列烯丙胺和烷基胺的一锅法合成具有活性和选择性,这些产品在精细化工和制药工业中非常重要。详细研究表明,固定化分子 Cu(I)–NHC 络合物负责胺、甲醛和末端炔烃的原子高效 A 3偶联,而所得炔丙基胺的选择性氢化由 Ru(0) 纳米粒子催化. 在单个载体上结合分子和纳米粒子位点的设计策略和制备方法非常灵活,为开发能够在一锅中进行复杂反应序列的多功能催化系统开辟了道路。
org/10.1016/j.tetlet.2012.08.136
作者:Tang, Yanchi、Xiao, Tiebo、Zhou, Lei
DOI:org/10.1016/j.tetlet.2012.08.136
日期:——
Nano Ag-doped magnetic-Fe3O4@mesoporous TiO2 core–shell hollow spheres: synthesis and enhanced catalytic activity in A3 and KA2 coupling reactions
作者:Ali Elhampour、Friuozeh Nemati、Majid M. Heravi
DOI:10.1007/s00706-017-1948-2
日期:2017.10
Nano Ag-doped Fe3O4@mesoporous TiO2 core-shell hollow spheres (h-Fe3O4@m-TiO2/Ag) were efficiently prepared. They were fully characterized by FT-IR, FE-SEM, EDX, ICP, TGA, XRD, and BET methods. In addition, their magnetic properties were determined by means of the VSM method. Also, the rho (shell) of the prepared hollow Fe3O4 micro-particles was calculated, being found just slightly lighter than that of solid sphere-like Fe3O4. The catalytic activity of this novel catalyst system was successfully examined as a novel catalyst system in A(3) coupling reactions (aldehyde + amine + acetylene). This highly active magnetic catalyst was easily separated using an external magnet and re-used in five consecutive runs in the model reaction without appreciable loss of its catalytic activity.[GRAPHICS].
Recyclable Cu/C<sub>3</sub>N<sub>4</sub> composite catalyzed AHA/A<sup>3</sup> coupling reactions for the synthesis of propargylamines
作者:Hang Xu、Jun Wang、Peng Wang、Xiyu Niu、Yidan Luo、Li Zhu、Xiaoquan Yao
DOI:10.1039/c8ra06613b
日期:——
be efficient for the synthesis of propargylamines using a three-componentcouplingreaction of alkynes, CH2Cl2 and amines (AHA) without additional base. Moreover, the catalyst also showed highly catalytic activity in the synthesis of C1-alkynylated tetrahydroisoquinolines (THIQs) via an A3 reaction of alkynes, aldehydes and THIQ. The Cu/C3N4-catalyzed multicomponent reactions exhibited good functional
发现非均相 Cu/C 3 N 4催化剂可有效合成炔丙基胺,使用炔烃、CH 2 Cl 2和胺 (AHA) 的三组分偶联反应,无需额外碱。此外,该催化剂在通过炔烃、醛和 THIQ的 A 3反应合成 C1-炔基化四氢异喹啉 (THIQ) 中也表现出高度催化活性。Cu/C 3 N 4催化的多组分反应在大多数例子中表现出良好的官能团耐受性。此外,容易制备的 Cu/C 3 N 4催化剂可以方便地回收和重复使用5次以上而不会失去催化活性。