反应详情

N,N,N′-trimethylethane-1,2-diamine (0.92 ml, 6.84 mmol), 1-hydroxybenzotriazole monohydrate (1.05 g, 6.84 mmol) and 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride (1.31 g, 6.84 mmol) were added to a chloroform solution (15 ml) of 3-chloro-2-fluoroisonicotinic acid (1.0 g, 5.70 mmol), and stirred under a nitrogen atmosphere at room temperature for 30 minutes. Saturated saline water was added to the reaction solution, and extracted with chloroform/methanol (9:1). The organic layer was dried over anhydrous sodium sulfate, and concentrated under reduced pressure. The obtained residue was purified by amine-type silica gel column chromatography (Biotage NH, hexane:ethyl acetate=4:1 to 1:1) to obtain 3-chloro-N-[2-(dimethylamino)ethyl]-2-fluoro-N-methylisonicotinamide (1.27 g, yield: 85%) as a colorless oil.

1. extractionextracted with chloroform/methanol (9:1)
2. dry with materialThe organic layer was dried over anhydrous sodium sulfate
3. concentrationconcentrated under reduced pressure
4. customThe obtained residue was purified by amine-type silica gel column chromatography (Biotage NH, hexane:ethyl acetate=4:1 to 1:1)