Ethyl Acetate → HCID 22258058, compound

Participants

Reaction Steps

Iron powder (0.85 g) and ammonium chloride (0.81 g) were added to a stirred suspension of 3-methyl-1-(2-methylpropyl)-6-(1-naphthalenylmethyl)-5-[(5-nitropyridin-2-yl)thio]thieno[2,3-d]pyrimidine-2,4-(1H, 3H)-dione (Example 37, 2.02 g) in ethanol (10 ml) and water (10 ml). The mixture was heated at reflux for 3 hours, then cooled to room temperature. 2M Sodium hydroxide solution (50 ml) was added and the mixture was stirred vigorously for 1 hour, ethyl acetate (100 ml) was added and the two-phase mixture was filtered. The solid and aqueous layer were in turn washed with ethyl acetate (100 ml). 2M Hydrochloric acid (25 ml) was added to the solid and the mixture was stirred for 1 hour, then added to the sodium hydroxide solution and extracted with ethyl acetate (2×10 ml). The combined organic extracts were dried over anhydrous magnesium sulfate, filtered and evaporated. The residue was recrystallised from ethyl acetate to give the title compound (1.07 g). The mother liquors were evaporated and purified by column chromatography over silica, eluting with ethyl acetate, and then recrystallised from ethyl acetate to give further title compound (0.665 g).

Provenance & Evidence