Oxidation of 3,4-dihydropyrimidin-2(1H)-ones with nitrosonium (NO+)

3,4-Dihydropyrimidin-2(1H)-ones (DHPMs) were oxidized with 1.2 equiv. of nitrosonium tetrafluoroborate (NO+BF4−) to pyrimidin-2(1H)-ones in acetonitrile at room temperature in high yields.