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Despite the efficacy of the [Pd2(dba)3]/1 catalyst system for the reactions of lithium triisopropyl 2-pyridylborates with arylbromides , more modest yields of the desired biaryls were obtained in the reactions of the corresponding aryl or heteroaryl chlorides.Employing 2 as the supporting ligand, however, provided a more active catalyst for this transformation.For example, the reaction of A with
4-chloroben-zonitrile furnished the desired productin 73% yield (Table3,entry1) .

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