反应详情

After adding tert-butyldimethylsilyl chloride (203 mg, 1.5 mmol) to a solution of 1-(3-cyclohexyl-3-hydroxypropyl)-4-(5-methylpyridin-2-yl)aminopiperidine (405 mg, 1.22 mmol), triethylamine (0.20 mL) and 4-dimethylaminopyridine (30 mg, 0.24 mmol) in methylene chloride (5 mL) while cooling on ice, the mixture was stirred at room temperature for 18 hours. Triethylamine (0.20 mL), 4-dimethylaminopyridine (30 mg, 1.5 mmol) and tert-butyldimethylsilyl chloride (203 mg, 1.5 mmol) were further added to the reaction mixture and stirring was continued at room temperature for 70 hours. NH silica Chromatorex DM1020 was added to the reaction mixture, which was then concentrated under reduced pressure. The residue was purified by silica gel column chromatography (60 g NH silica Chromatorex DM2035, hexane:ethyl acetate=4:1) to obtain the title compound as a colorless oil (423 mg) (77.7% yield).

1. temperaturewhile cooling on ice
2. stirringstirring
3. waitwas continued at room temperature for 70 hours
4. additionNH silica Chromatorex DM1020 was added to the reaction mixture, which
5. concentrationwas then concentrated under reduced pressure
6. customThe residue was purified by silica gel column chromatography (60 g NH silica Chromatorex DM2035, hexane:ethyl acetate=4:1)