Pd-Catalyzed CN Bond Formation with Heteroaromatic Tosylates
作者:Mette L. H. Mantel、Anders T. Lindhardt、Daniel Lupp、Troels Skrydstrup
DOI:10.1002/chem.200903235
日期:2010.5.10
palladium(0)‐catalyzed amidation of heteroaromatic tosylates was successfully developed. The methodology proved to be effective for a variety of heteroaryl tosylates including the pyridine, pyrimidine, quinoline and quinoxaline ring systems. Successful carbonnitrogen bond formation with these heteroaryl tosylates could be performed with a wide range of primary amides, oxazolidinones, lactams, anilines and
The catalytic conditions of copper(I) iodide/potassium carbonate/ TRANS- N, N′-dimethylcyclohexane-1,2-diamine, either in toluene at reflux temperature, or by heating neat at 150 °C effectively promoted the C-N coupling of aryl bromides with cyclic ureas. By employing a protection-deprotection strategy, unsymmetrical diaryl-substituted cyclic ureas could also be synthesized.