Abstract Pyridine N-oxide reacts with 2-and 3-aminopyridines and their Np-tolylsulfonyl derivatives in alkaline medium in the presence of p-toluenesulfonyl chloride to give Np- tolylsulfonyl-2, 2′-and 2, 3′-dipyridylamines, respectively, as a result of reductive acylamination. In the reactions with 4-aminopyridine and 4-p-tolylsulfonyl-aminopyridine, their Np-tolylsulfonyl-and N, N-bis (p-tolylsulfonyl) derivatives are formed, while reductive ...
