反应详情

温度

0 °C

To a solution of 3-{7-amino-2-[(2,4-dichlorophenyl)amino]-1H-benzimidazol-1-yl}-2,2-difluoropropan-1-ol (51.0 mg, 0.132 mmol) in methanol (1.3 mL) and acetic acid (26 μL) was added acetaldehyde (49 μL, 0.790 mmol) at 0° C. The mixture was stirred at 0° C. for 30 min. To the reaction mixture was added sodium triacetoxyborohydride (176.2 mg, 0.790 mmol) at 0° C. After 1 hr, the mixture was diluted with water and extracted with ethyl acetate (×3). The combined organic layer was washed with brine (×1), dried over anhydrous magnesium sulfate, filtered and concentrated in vacuo. The residue was purified by silica gel column chromatography eluting with a 0-30% ethyl acetate/n-hexane gradient mixture to give the title compound as an amorphous (49.8 mg, 0.112 mmol, 85%).

1. waitAfter 1 hr
2. extractionextracted with ethyl acetate (×3)
3. washThe combined organic layer was washed with brine (×1)
4. dry with materialdried over anhydrous magnesium sulfate
5. filtrationfiltered
6. concentrationconcentrated in vacuo
7. customThe residue was purified by silica gel column chromatography
8. washeluting with a 0-30% ethyl acetate/n-hexane gradient mixture