Oxidation of 3,4-dihydropyrimidin-2(1H)-thione using (diacetoxyiodo)benzene: unprecedented formation of substituted 2-(1,4-dihydropyrimidin-2-ylthio)pyrimidine

4-Aryl-6-methyl-3,4-dihydropyrimidin-2(1H)-thione scaffolds of Biginelli type were oxidized using (diacetoxyiodo)benzene and the reaction afforded 2-(1,4-dihydropyrimidin-2-ylthio)pyrimidine derivatives through an unprecedented oxidation-desulfurization process.