反应详情

温度

55 °C

NaH (60% in mineral oil, 60 mg) was added to a stirred solution of 4-imidazolecarboxamide (obtained in Preparation 1) (167 mg) in DMF (3.5 ml), and the reaction mixture was stirred for 1.5 hours at 55° C. Ethyl 2-bromovalerate (0.153 ml) was added to this mixture, and the reaction mixture was stirred for 3 hours at 55-60° C. The reaction mixture was poured into water and extracted with ethyl acetate. The organic layer was washed with brine, dried over magnesium sulfate, and concentrated in vacuo. The residue was purified by silica gel (12 g) chromatography eluting with chloroform/methanol (25:1) to give ethyl 2-(4-carbamoyl-1-imidazolyl)valerate (150 mg).

1. stirringthe reaction mixture was stirred for 3 hours at 55-60° C
2. extractionextracted with ethyl acetate
3. washThe organic layer was washed with brine
4. dry with materialdried over magnesium sulfate
5. concentrationconcentrated in vacuo
6. customThe residue was purified by silica gel (12 g) chromatography
7. washeluting with chloroform/methanol (25:1)