Rapid Construction of Imidazopyridines from ortho‐Haloaminopyridines.

A practical strategy for the preparation of imidazopyridine derivatives from ortho-haloaminopyridines utilizing a two-step C–N coupling/cyclization reaction sequence has been developed. This procedure provides rapid and efficient access to many medicinally interesting imidazopyridine compounds and related imidazopyrazine/purine heterocycles.