Manganese(<scp>ii</scp>) chloride catalyzed highly efficient one-pot synthesis of propargylamines and fused triazoles via three-component coupling reaction under solvent-free condition
作者:Shakil N. Afraj、Chinpiao Chen、Gene-Hsian Lee
DOI:10.1039/c4ra03232b
日期:——
A one-pot green and highly efficient method for the synthesis of propargylamines and diastereoselective synthesis of fused triazoles via three-component coupling in the presence of manganese(II) chloride as a catalyst and a catalyst-free 1,3-dipolar cycloaddition reaction, respectively, without using a co-catalyst or activator is reported. This methodology is efficient, eco-friendly, operationally
cationic [Ag(IPr)2]PF6 [IPr = 1,3-bis(2,6-diisopropylphenyl)imidazolylidene] complex proved to be a versatile and highly efficient catalyst for the production of propargylamines by using the A3-coupling reaction. The reaction conditions were equally applicable to aliphatic and aromatic aldehydes and alkynes, including highly hindered aromatic aldehydes. Progargylamines were prepared in short reaction times
The product obtained by reaction of deprotonation of 2‐mercaptobenzothiazole or methimazole (2‐mercapto‐1‐methylimidazole) with copper iodide in the presence of tertiary phosphines, PR2R' (R = R' = cyclohexyl; R = R' = phenyl; R = phenyl, R' = methyl) showed high catalytic activity in A3 coupling of a series of aldehydes with phenylacetylene and piperidine, yielding propargylamines. An investigation
在叔膦PR 2 R'(R = R'=环己基; R = R'=苯基)存在下,通过2-巯基苯并噻唑或甲or唑(2-巯基-1-甲基咪唑)与碘化铜的质子化反应获得的产物; R =苯基,R'=甲基)在A 3中显示出高催化活性一系列醛与苯乙炔和哌啶的偶合,产生炔丙基胺。主要通过电喷雾电离质谱(ESI-MS)技术对活性物质的性质进行的研究强调了有机硫和有机磷化合物在负责这些反应的活性物质的产生中所起的关键作用。偶联反应在水/ THF(20:1)中催化剂负载量低且反应时间较短的条件下成功进行。还用20个实施例研究了反应的范围。
Gold Nanoparticles Supported on Imidazole-Modified Bentonite: Environmentally Benign Heterogeneous Catalyst for the Three-Component Synthesis of Propargylamines in Water
Gold nanoparticles supported on imidazole-modified bentonite, Bent@Im@Au NPs, has been developed for the first time as an effective heterogeneous catalyst for the synthesis of propargylamines under mild reaction conditions in water at a loading of 0.07 mol % of Au. Various techniques such as X-ray diffraction, high-resolution transmission electron microscopy, Fourier transform infrared spectroscopy
首次开发了负载在咪唑改性膨润土Bent @ Im @ Au NPs上的金纳米颗粒,作为一种有效的非均相催化剂,用于在温和的反应条件下于水中以0.07 mol%的Au负载量合成炔丙胺。X射线衍射,高分辨率透射电子显微镜,傅立叶变换红外光谱和通过扫描电子显微镜进行的元素作图等各种技术被用于确定催化剂的物理化学性质。发现新的金催化剂是高活性的,通过具有吸电子以及给电子取代基的各种醛与不同的胺和炔烃的反应,提供了高到极好的A3偶联产物收率。