The Ru‐catalyzed reaction of bromodiynes with nitriles (II) and (VII) gives rise to the corresponding bromopyridines, which are obtained as regioisomeric mixtures in most cases.
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ChemInform Abstract: A Ruthenium Complex‐Catalyzed Cyclotrimerization of Halodiynes with Nitriles. Synthesis of 2‐ and 3‐Halopyridines