反应详情

To a room-temperature solution of 5-chloro-4-methylpyridine-2,3-diamine (200 mg, 1.27 mmol, 1.0 equiv) and 3-pentanone (400 uL, 3.78 mmol, 3.0 equiv) in THF (0.5 mL) and TFA (0.5 mL) was added sodium triacetoxyborohydride (807 mg, 3.81 mmol, 3.0 equiv) as a solid in one portion. The resulting mixture was allowed to stir overnight at room temperature. The reaction was then diluted with EtOAc and washed with saturated aq. NaHCO3. The organic layer was dried over anhydrous sodium sulfate, filtered, and concentrated in vacuo. The residue was purified by reverse phase HPLC to provide the title compound (49.4 mg, 17%). m/z=228.1 [M+H]+

1. washwashed with saturated aq. NaHCO3
2. dry with materialThe organic layer was dried over anhydrous sodium sulfate
3. filtrationfiltered
4. concentrationconcentrated in vacuo
5. customThe residue was purified by reverse phase HPLC