Molecular iodine-mediated S-N and C-N cross-coupling and oxidative aromatization of 3,4-dihydropyrimidin-2(1H)-thiones with secondary amines

A domino S-N and C-N coupling/oxidative aromatization process to synthesize 2-aminothio-phenylpyrimidines and 2-amino-phenylpyrimidines by S-N and C-N cross-coupling reactions is described. This methodology couples 3,4-dihydropyrimidine-2-thiones and secondary amines catalyzed by molecular iodine. Remarkably the C-N coupled product was obtained via a desulfitative coupling-aromatization reaction in one-pot reaction.