反应详情

温度

110 °C

To a solution of (R)—N,N-dimethylpiperidine-3-carboxamide (10 g, 64.04 mmol) in dimethylsulfoxide (100 mL) were added triethylamine (17.8 mL, 128.08 mmol) and 6-chloro-3-nitropyridin-2-amine (7.76 g, 44.82 mmol) at room temperature under a nitrogen atmosphere. The reaction mixture was heated at 110° C. for 16 h. The reaction mixture was added to cold water and extracted with ethyl acetate. The organic layer was washed with cold water 3 times, dried over sodium sulfate and evaporated under reduced pressure. The crude compound was purified via flash chromatography and then treated with 1:1 petroleum ether and diethyl ether to afford (R)-1-(6-amino-5-nitropyridin-2-yl)-N,N-dimethylpiperidine-3-carboxamide (11 g, 72%). MS (ES+APCI) (M+H) 294.1; LCMS retention time: 2.777 min (Method E1)

1. extractionextracted with ethyl acetate
2. washThe organic layer was washed with cold water 3 times
3. dry with materialdried over sodium sulfate
4. customevaporated under reduced pressure
5. customThe crude compound was purified via flash chromatography
6. additiontreated with 1:1 petroleum ether and diethyl ether