Trifluoroacetamide → HCID 178518703, compound

Participants

Reaction Conditions

Reaction Steps

A 1 L round-bottom flask (three neck) containing 340 g of trifluoroacetamide was heated in an oil bath at 110° C. After the trifluoroacetamide melted, 50 g of 5-aminoimidazole-4-carboxamide-HCl was added. The mixture was warmed to reflux (bath temp 160 to 165° C.) for 4 hours, cooled to room temperature, and the rocky solid was triturated with 1 L of ether. The ether was decanted off and the remaining solid was warmed until melted and 200 mL of ether was introduced by a dropping-funnel through a water-cooled condenser. The mixture was cooled to room temperature and an additional 200 mL of ether was added with stirring. The solid was removed by filtration, triturated with 3×500 mL of ether, washed with 200 mL of H2O, and filtered to provide 89 g of crude product. The product was treated with 3 L of MeOH and 9 g of activated carbon, warmed to reflux for 20 minutes, filtered through a pad of celite, and concentrated to a volume of 2.5 L. The material was warmed to dissolve all the precipitate that formed and then cooled slowly to room temperature. The crystalline material was isolated by filtration and dried in vacuo to provide 41 g of the desired hypoxanthine as a white solid. 1H NMR (DMSO-d6) δ 8.34 (s, 1H), 7.18 (bs, 2H). MS (ES+), 205.0 (100%, M+H).

Provenance & Evidence