Sodium Dithionite → 5,6-Diamino-1,3-dimethyluracil

Participants

Reaction Conditions

Reaction Steps

Crude 6-amino-1,3-dimethyl-5-nitroso-1H-pyrimidine-2,4-dione (5 mmol) was suspended in water (7 mL) at 40° C. and treated with sodium dithionite (17.5 mmol). After 20 minutes at 40° C. the reaction mixture was warmed to 80° C. for 30 mins and then cooled in ice for 30 mins. The precipitate was isolated by filtration, washed with cold water and dried in vacuo to give crude 5,6-diamino-1,3-dimethyl-1H-pyrimidine-2,4-dione as a light beige solid which was of sufficient purity for subsequent use without additional purification (80%).

Provenance & Evidence