反应详情

温度

0 °C

To a solution of tert-butyl((2S)-1-((5-cyclopropyl-5H-chromeno[3,4-c]pyridin-8-yl)oxy)-4-methylpentan-2-yl)carbamate (250 mg, 0.570 mmol) in CH2Cl2 (4 mL) cooled to 0° C. was added 1N HCl in dioxane (2 mL, 0.570 mmol) slowly over a period of 5 min. The reaction mixture was stirred at 0° C. for 5 min then was warmed to room temperature and allowed to stir for 2 h. The solvents were removed by concentration under reduced pressure. The crude product was washed with ethyl acetate to yield (2S)-1-(5-cyclopropyl-5H-chromeno[3,4-c]pyridin-8-yloxy)-4-methylpentan-2-amine as an HCl salt (240 mg, 42% yield). LCMS (ESI) m/e 339.2 [(M+H)+, calcd for C21H27N2O2 339.2]; LC/MS retention time (Method C): tR=1.28 min. The diastereomeric mixture of amines was resolved by chiral preparative HPLC (0.2% DEA in n-hexane, ethanol).

1. temperaturethen was warmed to room temperature
2. stirringto stir for 2 h
3. customThe solvents were removed by concentration under reduced pressure
4. washThe crude product was washed with ethyl acetate