Copper(0)-Induced Deselenative Insertion of N,N-Disubstituted Selenoamides into Acetylenic C−H Bond Leading to Propargylamines
摘要:
Upon heating at 110 degrees C in the presence of copper(0) powder, terminal acetylenes undergo a novel deselenative C-H bond insertion reaction of N,N-substituted selenoamides, affording the corresponding propargylamines in good to excellent yields, selectively.
Bifunctional Solid Catalyst for Organic Reactions in Water: Simultaneous Anchoring of Acetylacetone Ligands and Amphiphilic Ionic Liquid “Tags” by Using a Dihydropyran Linker
作者:Bingbing Lai、Fuming Mei、Yanlong Gu
DOI:10.1002/asia.201800567
日期:2018.9.4
bifunctional silica‐based solid catalyst that possessed an ionicliquid tail and a metal acetylacetonate moiety was prepared through a mild Lewis‐acid‐catalyzed ring‐opening reaction with a thiol‐functionalized silica. The surfactant‐combined silica‐supported metal acetylacetone catalysts displayed excellent catalytic activity in water for a range of reactions. The solid catalyst was also shown to be recyclable
or terminal propargylamines and chalcones via A3-coupling reaction of aldehydes, amines, and alkynes catalyzed by an easily available catalyst Ag2CO3 under solvent-free condition. The reaction proceeded smoothly to deliver various products in good-to-excellent yields with good functional group tolerance. Gram-scale preparation, bioactive molecule synthesis and asymmetric substrates have been demonstrated
几个简单,快速和实用的协议已被开发来合成内部或末端炔丙胺和查耳酮通过甲3 -耦合醛,胺的反应,和炔由容易获得的催化剂催化的Ag 2 CO 3无溶剂条件下进行。反应进行得很顺利,以良好的收率和良好的官能团耐受性提供了各种产品。已经证明了克级制备,生物活性分子合成和不对称底物。此外,已经提出了合成不同产物的合理机制。
Expeditious and highly efficient synthesis of propargylamines using a Pd‐Cu nanowires catalyst under solvent‐free conditions
作者:Rongnan Yi、Zheng‐Jun Wang、Zhiwu Liang、Min Xiao、Xinhua Xu、Ningbo Li
DOI:10.1002/aoc.4917
日期:2019.6
expeditious and solvent‐free synthesis of propargylamines via A3‐coupling of aldehydes, alkynes, and amines has been proposed. A wide range of aldehydes, alkynes and amine substrates undergo A3‐coupling to produce propargylamines in good to excellent yields with good functional tolerance, such as that towards alkoxy, hydroxy, C‐X (X = F, Cl, Br) as well as amide and C=C bonds. Furthermore, the catalyst could
The design and development of a silica gel anchored copper chloride heterogeneous catalyst for the synthesis of propargylamines using an amine, an aldehyde, and an alkyne through C-H activation in water is described. Both aliphatic and aromatic aldehydes and amines are used for the reaction. The catalyst was recovered quantitatively by simple filtration and reused several times. (C) 2007 Elsevier Ltd. All rights reserved.