A general method for the synthesis of unsymmetrically substituted ureas via palladium-catalyzed amidation.
Brian J Kotecki, Dilinie P Fernando, Anthony R Haight, Kirill A Lukin
文献索引:Org. Lett. 11 , 947, (2009)
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摘要
A general and practical method for the preparation of unsymmetrically substituted ureas has been developed utilizing palladium-catalyzed amidation. Both aryl bromides and chlorides, as well as heteroaryl chlorides, have been coupled to aryl, benzyl, and aliphatic ureas by using a novel nonproprietary bipyrazole ligand (bippyphos).
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