Synthesis of Symmetrical and Unsymmetrical <b><i>N</i></b>-Aryl-Substituted Cyclic Ureas through Copper(I) Iodide Catalyzed Goldberg-Buchwald-Nandakumar C-N Coupling Reactions
作者:Man-kit Leung、Chung-Chieh Lee、Po-Shih Wang、M. Viswanath
DOI:10.1055/s-2008-1042946
日期:2008.5
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.
碘化铜(I)/碳酸钾/反式-N,N'-二甲基环己烷-1,2-二胺的催化条件,无论是在甲苯中在回流温度下,还是在150℃下加热纯,都有效地促进了芳基的CN偶联。溴化物与环脲。通过采用保护-去保护策略,还可以合成不对称的二芳基取代的环状脲。