Ethanol → 3-cyclopropyl-6-methylamino-1-(3-nitrophenyl)-1H-pyrimidine-2,4-dione

Participants

Reaction Conditions

Reaction Steps

To the mixture (30 g) of 6-chloro-3-cyclopropyl-1-(3-nitrophenyl)-1H-pyrimidine-2,4-dione 6 and 4-chloro-3-cyclopropyl-1-(3-nitrophenyl)-1H-pyrimidine-2,6-dione 7 obtained in Step 3 were added ethanol (300 ml) and a 40% solution (150 ml) of methylamine in methanol, and the mixture was stirred with heating at 80° C. for 4.5 hrs, ice-cooled and the precipitated solid was filtered by suction. The residue was washed with water (1 liter) and dried to give 3-cyclopropyl-6-methylamino-1-(3-nitrophenyl)-1H-pyrimidine-2,4-dione 8 (16 g, 55%) as a white solid.

Provenance & Evidence