反应详情

To a mixed solution of a commercially available product of 2,2-diethoxyethan-1-amine (926 μL, 6.39 mmol), THF (10.0 mL) and acetic acid (1.00 mL) was added a commercially available product of 6-fluoropyridine-2-carbaldehyde (800 mg, 6.39 mmol) at room temperature. The resultant mixture was stirred at room temperature for 25 minutes. Subsequently, sodium triacetoxyborohydride (2.71 g, 12.8 mmol) was added to the reaction mixture at room temperature and then stirred for 1 hour and 10 minutes. To the reaction mixture was added sodium hydrogen carbonate and water to terminate the reaction. The resultant solution was extracted with ethyl acetate. An organic layer was dried over anhydrous magnesium sulfate and then filtrated. The solvent was evaporated under a reduced pressure, and the resultant residue was purified by NH silica gel column chromatography (heptane:ethyl acetate=1:1), and was then further purified by silica gel column chromatography (ethyl acetate:methanol=20:1) to give the title compound (1.14 g, yield: 74%).

1. customto terminate
2. customthe reaction
3. extractionThe resultant solution was extracted with ethyl acetate
4. dry with materialAn organic layer was dried over anhydrous magnesium sulfate
5. filtrationfiltrated
6. customThe solvent was evaporated under a reduced pressure
7. customthe resultant residue was purified by NH silica gel column chromatography (heptane:ethyl acetate=1:1)
8. customwas then further purified by silica gel column chromatography (ethyl acetate:methanol=20:1)