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Synthesis 2008(9): 1359-1366
DOI: 10.1055/s-2008-1042946
DOI: 10.1055/s-2008-1042946
PAPER
© Georg Thieme Verlag Stuttgart · New York
Synthesis of Symmetrical and Unsymmetrical N-Aryl-Substituted Cyclic Ureas through Copper(I) Iodide Catalyzed Goldberg-Buchwald-Nandakumar C-N Coupling Reactions
Weitere Informationen
Publikationsverlauf
Received
10 December 2007
Publikationsdatum:
18. März 2008 (online)


Abstract
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.
Key words
arylation - copper - cross-coupling - homogeneous catalysis - heterocycles