反应详情

温度

50 °C

To a mixture of 4-iodopyrazole (1.000 g, 5.155 mmol), Cs2CO3 (2.016 g, 6.186 mmol), and DMF (20 mL, 0.2 mol) was added methyl 3-chloropropanoate (758.1 mg, 6.186 mmol) at 0° C. The reaction was heated to 50° C. for 1 h. The material was transferred to a separatory funnel, diluted with EtOAc, and washed with water several times to remove DMF. The organic layer was dry-loaded onto silica gel, and column chromatography was used for purification, eluting with 3:1 Hexanes/EtOAc, affording the title compound as a clear liquid. MS (ES+): m/z=280.95 (100) [MH+]. HPLC: tR=2.91 min (ZQ3, polar—5 min).

1. customThe material was transferred to a separatory funnel
2. washwashed with water several times
3. customto remove DMF
4. customwas used for purification
5. washeluting with 3:1 Hexanes/EtOAc