反应详情

To a suspension of 508 mg of 4-carbamoylimidazolium-5-olate and 486 mg of triethylamine in 6 ml of anhydrous dimethylformamide was added 770 mg of p-chlorobenzoyl chloride in 3 ml of anhydrous dimethylformamide at a temperature below 5° C. The mixture was stirred under ice cooling for 4 hours. The insoluble crystals were filtered off, then the filtrate were concentrated to a residue under reduced pressure, and the resulting residue was dissolved in chloroform. The chloroform solution was washed with water, and dried over anhydrous sodium sulfate. The solvent was removed under reduced pressure to give 5-carbamoyl-1H-imidazol-4-yl p-chlorobenzoate. The crude solid was washed with ethyl acetate to give 340 mg of pure product, m.p. 220° C. (charred).

1. filtrationThe insoluble crystals were filtered off
2. concentrationthe filtrate were concentrated to a residue under reduced pressure
3. dissolutionthe resulting residue was dissolved in chloroform
4. washThe chloroform solution was washed with water
5. dry with materialdried over anhydrous sodium sulfate
6. customThe solvent was removed under reduced pressure