反应详情

Add triethylamine (11.9 mL, 84.5 mmol) dropwise to a suspension of nicotinic acid (10 g, 81.2 mmol), N,O-dimethylhydroxylamine hydrochloride (8.3 g, 85.3 mmol, 1.05 eq), 1-hydroxybenzotriazole (3.29 g, 24.36 mmol, 0.3 eq) and 1,3-dimethylamino propyl-3-ethylcarbodiimide hydrochloride (18.68 g, 97.44 mmol, 1.2 eq) in acetonitrile (100 mL) at room temperature under nitrogen. After 2 h a white precipitate forms. Add water (100 mL) and acetonitrile and evaporate under vacuum. Extract with ethyl acetate (3×100 mL), dry the organic phase over anhydrous sodium sulfate and concentrate to afford 13.19 g (98%) of the title compound.

1. customAdd water (100 mL) and acetonitrile and evaporate under vacuum
2. extractionExtract with ethyl acetate (3×100 mL)
3. dry with materialdry the organic phase over anhydrous sodium sulfate
4. concentrationconcentrate