反应详情

An ice-cold suspension of 1-aminohydantoin hydrochloride (457 mg, 3.0 mmol), cyanuric chloride (500 mg, 2.73 mmol) and sodium bicarbonate (505 mg, 6 mmol) in acetonitrile (5 mL) was stirred under an atmosphere of nitrogen for 2 h and then stirred at room temperature for 20 h. The reaction mixture was evaporated to dryness under reduced pressure and the residue was extracted with ethyl acetate and the ethyl acetate was separated and dried (MgSO4). The crude product (770 mg) gave a single spot on thin layer chromatography [silica; CH2Cl2/MeOH (10:1)] and was used in the next step without further purification. 1H NMR (CD3CN): δ=4.11 (s, 2H); 8.71 (s, 1H); 8.85 (s, 1H).

1. stirringstirred at room temperature for 20 h
2. customThe reaction mixture was evaporated to dryness under reduced pressure
3. extractionthe residue was extracted with ethyl acetate
4. customthe ethyl acetate was separated
5. dry with materialdried (MgSO4)