Sodium Dithionite → HCID 86631121, compound

Participants

Reaction Steps

To 6-amino-1-[1-(1H-benzimidazol-2-yl)ethyl]-2-thioxo-2,3-dihydropyrimidin-4(1H)-one (0.21 g, 0.74 mmol, obtained from Example 9(d)) in acetic acid (2 mL) was added, dropwise, a solution of sodium nitrite (0.056 g, 0.81 mmol) in H2O (0.5 mL). After 50 minutes sodium dithionite (0.26 g, 1.5 mmol) was added and the reaction was stirred 20 minutes, followed by evaporation of acetic acid in vacuo and addition of water (25 mL). The precipitated solid was collected by filtration, washed with H2O and dried giving the title compound, which was used in the next step without further purification.

Provenance & Evidence