反应详情

A mixture of 2,6-difluorobenzoic acid (43 mg, 0.28 mmol), 3-(1H-benzimidazol-2-yl)-1H-pyrazol-4-ylamine (50 mg, 0.25 mmol), EDC (58 mg, 0.30 mmol) and HOBt (40.5 mg, 0.30 mmol) in DMF (10 ml) was stirred at ambient temperature for 24 h. The mixture was reduced in vacuo, water (30 ml) added and the resultant solid collected by filtration, dried in the vacuum oven and purified by flash column chromatography [SiO2, EtOAc-petrol (1:2, 1:1, 3:1)] affording N-[3-(1H-benzimidazol-2-yl)-1H-pyrazol-4-yl]-2,6-difluoro-benzamide (20 mg, 24%). (LC/MS: Rt 3.29, [M+H]+ 339.64).

1. additionadded
2. filtrationthe resultant solid collected by filtration
3. customdried in the vacuum oven
4. custompurified by flash column chromatography [SiO2, EtOAc-petrol (1:2, 1:1, 3:1)]