2-Bromopyridines As Versatile Synthons for Heteroarylated 2-Pyridones Via Ru(II)-Mediated Domino C-O/C-N/C-C Bond Formation Reactions
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Abstract
A novel methodology for the synthesis of 2-pyridones bearing a 2-pyridyl group on nitrogen and carbon atoms, starting from 2-bromopyridines, was developed employing a simple Ru(II)-KOPiv-NaCO catalytic system. Unsubstituted 2-bromopyridine was successfully converted to the penta-heteroarylated 2-pyridone product using this method. Preliminary mechanistic studies revealed a possible synthetic pathway leading to the multi-heteroarylated 2-pyridone products, involving consecutive oxygen incorporation, a Buchwald-Hartwig-type reaction, and C-H bond activation.
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