Urea as Ammonia Equivalent in Aryl Halides Animation Catalyzed by Palladium Complexes

摘要

Urea reaction with nonactivated aryl bromides and chlorides under catalysis with palladium complexes led to the formation in 65-95% yield of triarylamines frompara-and meta-substituted aryl halides and of diarylamines from ortho-isomers.Reactions catalyzed by palladium complexes are nowadays extensively exploited in the aryl halides animation(Buchwald-Hartwig reaction).However,the existing procedure has no direct approach to the synthesis of primary aromatic amines.