modified Ullmann couplingreactions creating C–O bonds, including diaryl ethers or phenols, are vital to organic synthesis. Synthesized N-phenyl-2-pyridinecarboxamide and its derivatives were used as ligands in conjunction with catalytic copper sources in the formation of various diaryl ethers and phenols. Various aryl and heteroaryl halides with electron donating and withdrawinggroups were reacted with
Method of forming a carbon-carbon or carbon-heteroatom linkage
申请人:Taillefer Marc
公开号:US20050234239A1
公开(公告)日:2005-10-20
The invention relates to a method of creating a carbon-carbon or carbon-heteroatom linkage by reacting an unsaturated compound bearing a leaving group and a nucleophilic compound. More specifically, the invention relates to the creation of a carbon-nitrogen linkage involving the arylation of nitrogenous organic derivatives. The inventive method consists in creating a carbon-carbon or carbon-heteroatom linkage by reacting an unsaturated compound bearing a leaving group and a nucleophilic compound providing a carbon atom or a heteroatom (HE) capable of being substituted for the leaving group, thereby creating a C—C or C-HE linkage. The invention is characterised in that the reaction is carried out in the presence of an effective quantity of a catalyst based on copper and at least one ligand comprising at least one imine function and at least one additional nitrogen atom as chelating atoms
Green alternative solvents for the copper-catalysed arylation of phenols and amides
作者:Carlo Sambiagio、Rachel H. Munday、A. John Blacker、Stephen P. Marsden、Patrick C. McGowan
DOI:10.1039/c6ra02265k
日期:——
for the Cu-catalysed arylation of phenols and amides is reported. Alkyl acetates proved to be efficient solvents in the catalytic processes, and therefore excellent alternatives to the typical non-green solvents used for Cu-catalysed arylationreactions. Solvents such as isosorbide dimethyl ether (DMI) and diethyl carbonate also appear to be viable possibilities for the arylation of phenols. Finally
Tris-(2-aminoethyl) amine as a novel and efficient tripod ligand for a copper(I)-catalyzed C–O coupling reaction
作者:Nivrutti R. Jogdand、Bapurao B. Shingate、Murlidhar S. Shingare
DOI:10.1016/j.tetlet.2009.03.028
日期:2009.7
We have introduced a novel, efficient, commercially available and economically attractive N-donor tripod ligand, tris-(2-aminoethyl)amine for copper-catalyzed Ullmann diaryl ether synthesis. This catalyst system is highly active for both aryl iodides and aryl bromides. Variously substituted diaryl ethers have been synthesized in good to excellent yields.
be efficiently performed by means of catalytic amounts of copper iodide and the inexpensive ligand 1 (structure given in Table 1). The reaction is applicable to a wide range of substrates and proceeds at 60–80 °C, the lowest temperatures reported to date for an Ullmann-type synthesis of diarylethers. Moreover, the use of aryl bromides and inexpensive K3PO4 as base make this method attractive for applications
苯酚和芳基溴化物的偶联可通过催化量的碘化铜和廉价的配体1(表1中给出的结构)有效地进行。该反应适用于多种底物,反应温度为60–80°C,这是迄今为止报道的Ullmann型二芳基醚合成的最低温度。此外,使用芳基溴化物和廉价的K 3 PO 4作为碱使得该方法对于工业规模的应用具有吸引力。