反应详情

To a suspension of 4-carbamoylimidazolium-5-olate (4.064 g) in dimethylformamide (80 ml) was added triethylamine (7.768 g) at 0°-5° C. and then 1-adamantanecarbonylchloride (14.00 g) in dimethylformamide (80 ml) dropwisely over 22 minutes. The reaction mixture was stirred at 0°-5° C. for 15 hours. The solvent was removed under reduced pressure. To the residue was added ethyl acetate (100 ml) and water (100 ml), and stirred at room temperature for 1 hours. The insoluble solid was filtered and washed with ethyl acetate to give almost pure 5-carbamoyl-1H-imidazol-4-yl 1-adamantanecarboxylate (5.67 g, β form, m.p. 207°-210° C. (dec.)).

1. customThe solvent was removed under reduced pressure
2. additionTo the residue was added ethyl acetate (100 ml) and water (100 ml)
3. stirringstirred at room temperature for 1 hours
4. filtrationThe insoluble solid was filtered
5. washwashed with ethyl acetate