反应详情

2-tert-Butyl-1-[(4,4-difluorocyclohexyl)methyl]-1H-benzimidazole-5-sulfonyl chloride (0.8 g, 1.9 mmol) was added to a solution of 1H-pyrazole-4-carbaldehyde (0.6 g, 6.2 mmol) and DMAP (1.5 g, 12 mmol) in DCE (70 mL) at 0° C. The reaction mixture was allowed to warm to ambient temperature and stirred for 3 h. The solvent was concentrated and the product was purified by flash chromatography on silica gel using DCM/EtOAc (1:1) as eluent to provide the title compound as white solid. Yield: 0.34 g (36%); MS (ESI) (M+H)+=465.0.

1. concentrationThe solvent was concentrated
2. customthe product was purified by flash chromatography on silica gel