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No abstract

[reaction: see text] Reaction of various aromatic aldehydes with 2,2'-dipyridyl ketone and ammonium acetate in hot acetic acid provides ready access to a series of substituted 1-pyridylimidazo[1,5-a]pyridines, a class of ligands possessing an N,N-bidentate feature, in good yields.

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A facile and one-pot straightforward methodology has been developed to prepare a novel class of imidazo[1,5-a]pyridines. A key role played by ammonium acetate in chemoselectivity has been examined.