Palladium-catalyzed Cross-coupling of Phenylboronic Acid with Heterocyclic Aromatic Halides

Abstract
The coupling reaction of bromo- and iodopyridines 1 with phenylboronic acid (2a) by Pd(Ph3P)4 provides a convenient route to phenylpyridines, even when electrondonating or-withdrawing substituents are present. The method is also successful for the preparation of other phenylated N-containing heterocycles 5 as phenylquinolines and -pyrimidines.
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