Cu@Ag–TiO2–NGO prepared from modified graphene by simple methodology exhibits enhanced catalytic activity towards oxidation and Chan–Lam coupling due to the synergistic effect between Ag and Cu NPs.
selective N-arylation of amines or azoles with aryl halides, methyl-α-d-glucopyranoside (MG) was found to function as a green ligand of copper powder. In addition, nitrogenheterocyclic amine compounds can also undergo the N-arylation coupling with heterocyclic aryl chlorides. This process allows access to a variety of aromatic amines and aryl azoles under mild reaction conditions, has good tolerance, and
An inexpensive and efficientcatalystsystem has been developed for the N-arylation of nitrogen-containing compounds including a variety of amines, amides, indole and imidazole. This simple protocol uses CuI as the catalyst, commercial available pipecolinic acid as the new ligand, K2CO3 as the base and DMF as the solvent.
已经开发了一种廉价且有效的催化剂体系,用于含氮化合物的N-芳基化,所述含氮化合物包括多种胺,酰胺,吲哚和咪唑。这个简单的协议使用CuI作为催化剂,使用市售的胡椒酸作为新的配体,使用K 2 CO 3作为碱,使用DMF作为溶剂。
Iron/Copper-Cocatalyzed
Ullmann N,O-Arylation Using FeCl<sub>3</sub>, CuO, and <i>rac</i>-1,1′-Binaphthyl-2,2′-diol
作者:Hua Fu、Zhe Wang、Yuyang Jiang、Yufen Zhao
DOI:10.1055/s-2008-1078214
日期:——
We have developed an efficient and inexpensive bimetallic catalyst FeCl3, CuO, and rac-BINOL that could promote N,O-arylation of aliphatic, arylamines, and phenols. The cross-coupling reaction conditions have high tolerance of various functional groups. This versatile and efficient iron/copper-cocatalyst can widely be used in the synthesis of the compounds containing (aryl)C-N or (aryl)C-O(aryl) bond.
A New Method for the Selective Amination of 1,3- and 1,4-Dinitrobenzenes and Protected Nitroanilines Leading to Polyfunctional 1,3- and 1,4-Disubstituted Anilines
作者:Paul Knochel、Ioannis Sapountzis
DOI:10.1055/s-2004-820043
日期:——
The addition of functionalized arylmagnesium reagents to dinitrobenzenes and protected nitroanilines at -20 °C in THF furnishes after a reductive workup polyfunctional diarylamines in 47-92% yield.