Silica nanospheres supported diazafluorene iron complex: an efficient and versatile nanocatalyst for the synthesis of propargylamines from terminal alkynes, dihalomethane and amines
作者:R. K. Sharma、Shivani Sharma、Garima Gaba
DOI:10.1039/c4ra10384j
日期:——
A novel silica nanosperes supported diazafluorene iron complex has been fabricated and found to be effective in three-component coupling reaction of terminal alkynes, dichloromethane and amines.
Nickel-catalyzed three-component coupling reaction of terminal alkynes, dihalomethane and amines to propargylamines
作者:Satish R. Lanke、Bhalchandra M. Bhanage
DOI:10.1002/aoc.3071
日期:2013.12
bond formation reactions using alkynes. Propargylic amines are synthetically versatile intermediates for the preparation of many nitrogen‐containing biologically active motifs. Herein, a 15 mol% Ni(py)4Cl2/bipyridine‐catalyzed three‐component coupling reaction of alkynes, halomethane and amines through C―H and C―halogen activation was developed for the facilesynthesis of propargylic amines. Tetramethylguanidine
N-Heterocyclic Carbene-Protected Ag Nanoparticles Immobilized on Polyacrylonitrile Fiber as Efficient Catalysts for a Three-Component Coupling Reaction
作者:Jian Cao、Hongqi Tian
DOI:10.1002/asia.201800154
日期:2018.6.18
report the preparation and characterization of N‐heterocyclic carbene (NHC)‐stabilized silver NPs supported on polyacrylonitrile fiber (PANF). As a result, Ag loadings of up to 8 % and particle sizes of 11.0±3.2 nm were achieved. This novel nanocomposite catalyst demonstrated high activity in addition to excellent stability and reusability in the three‐component reaction between alkynes, haloalkanes
金属纳米颗粒(NPs)通常通过引入封端剂或其在载体上的分布来稳定。在此背景下,我们报告了聚丙烯腈纤维(PANF)上负载的N杂环卡宾(NHC)稳定的银NP的制备和表征。结果,实现了高达8%的Ag负载和11.0±3.2nm的粒径。除了在炔烃,卤代烷烃和胺的三组分反应中具有出色的稳定性和可重复使用性之外,这种新型的纳米复合催化剂还具有很高的活性。在该系统中,通过支持作用和配体作用使AgNP稳定。独特的NHC保护的AgNP结构和PANF支持在C sp的去质子化中发挥协同作用-H键,周转数高达3500。该催化剂成功地循环使用了八次,活性没有明显损失,并且AgNPs没有明显的聚集。此外,使用PANF-NHC @ Ag作为催化剂的流动系统的实施可产生57 mmol h -1的有效生产率。
A highly efficient three-component coupling of aldehyde, terminal alkyne, and amine via C–H activation catalyzed by reusable immobilized copper in organic–inorganic hybrid materials under solvent-free reaction conditions
作者:Pinhua Li、Lei Wang
DOI:10.1016/j.tet.2007.04.032
日期:2007.6
Recycling copper(I) immobilized on organic–inorganic hybrid material behaves as a very efficient heterogeneous catalyst in the three-component Mannich coupling reaction of aldehydes, terminalalkynes, and amines via C–H activation to afford the corresponding products in good to excellent yields under solvent-free reaction conditions.
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.