Fig. 6: Proposed mechanism for regioselective and site-divergent reductive hydroarylation of pyridinium salts.

A possible mechanism for C4- and C6-selective reduction hydroarylation of pyridinium salts under Co-catalysis and metal-free conditions.

A possible mechanism for C4- and C6-selective reduction hydroarylation of pyridinium salts under Co-catalysis and metal-free conditions.