Palladium-Catalyzed C(sp<sup>2</sup>)–N Bond Cross-Coupling with Triaryl Phosphates
作者:Zicong Chen、Xiangmeng Chen、Chau Ming So
DOI:10.1021/acs.joc.9b00703
日期:2019.5.17
The first general palladium-catalyzed amination of aryl phosphates is described. The combination of MorDalPhos with [Pd(π-cinnamyl)Cl]2 enables the amination of electron-rich, electron-neutral, and electron-poor aryl phosphates with a board range of aromatic, aliphatic, and heterocyclic amines. Common functional groups such as ether, keto, ester, and nitrile show an excellent compatibility in this
Metal-free regioselective C-3 acetoxylation of N-substituted indoles: crucial impact of nitrogen-substituent
作者:Vineeta Soni、Ulhas N. Patel、Benudhar Punji
DOI:10.1039/c5ra10428a
日期:——
A metal-free method for the regioselectiveC-3 acetoxylation of the N-substituted indoles with PhI(OAc)2 is described under mild reaction conditions. This method tolerates a broad range of functional groups with moderate to good yields. The π-electron-deficient aryl-substituents on the N-atom of indoles and the acidic reaction medium remarkably favor C-3 acetoxylation.
Magnetic nanoparticle-supported proline as a recyclable and recoverable ligand for the CuI catalyzed arylation of nitrogen nucleophiles
作者:Gagan Chouhan、Dashan Wang、Howard Alper
DOI:10.1039/b711298j
日期:——
Magnetic nanoparticle-supported proline ligand was prepared and used for the CuI catalyzed Ullmann-type coupling reactions of aryl/heteroaryl bromides with various nitrogen heterocycles to form the corresponding N-aryl products in good to excellent yields; furthermore, this magnetic nanoparticle-supported proline ligand could be readily separated using an external magnet and reused without significant loss of activity.
Cu(OAc)2·H2O-catalyzed N-arylation of nitrogen-containing heterocycles
作者:Zhong-Lin Xu、Hong-Xi Li、Zhi-Gang Ren、Wei-Yuan Du、Wei-Chang Xu、Jian-Ping Lang
DOI:10.1016/j.tet.2011.05.025
日期:2011.7
In the absence of any additional ligands, the efficientN-arylation of nitrogen-containing heterocycles with aryl iodides catalyzed by relative low catalyst amount of Cu(OAc)2·H2O was developed. This simple catalytic system is involved in the C–N cross-coupling reaction and works for a variety of pyrazole, pyrrole, imidazole, triazole, indole, benzoimidazole, benzotriazole, carbazole, and anilines
Efficacy of C-N Coupling Reactions with a New Multinuclear Copper Complex Catalyst and Its Dissociation into Mononuclear Species
作者:Yan Zou、Haisheng Lin、Paul A. Maggard、Alexander Deiters
DOI:10.1002/ejoc.201100399
日期:2011.8
A new tetranuclear copper(I)–pyridazine (pda)/rhenate hybrid has been synthesized under hydrothermal conditions and structurally characterized by X-ray crystallography. The activity of this catalyst, as well as itsdissociation into mononuclearspecies, was investigated in homogeneous C–N arylation reactions. A variety of N-arylamides and -azoles were synthesized in good to excellent yields, revealing
在水热条件下合成了一种新的四核铜(I)-哒嗪(pda)/铼酸盐杂化物,并通过 X 射线晶体学进行结构表征。在均相 C-N 芳基化反应中研究了该催化剂的活性,以及其离解成单核物质。合成了多种 N-芳基酰胺和 -唑类化合物,产率非常好,揭示了多核与单核 Cu 络合在此类偶联反应中的影响。