反应详情

To a cooled (0° C.) suspension of lithium aluminum hydride (3.295 g, 86.8 mmol) in anhydrous diethyl ether (150 mL) was added a solution of 3-(cyclopentylamino)propanenitrile (6.000 g, 43.4 mmol) in anhydrous diethyl ether (40 mL), dropwise over 45 mins. The reaction mixture was stirred at room temperature for 15 mins and at reflux for 4 hrs, cooled to room temperature and stirred for 1 hr. The mixture was cooled to 0° C. and vigorously stirred while water (3.4 mL) was added dropwise, followed by 15% aqueous sodium hydroxide (3.4 mL), and finally water (10.2 mL). The resultant slurry was warmed to room temperature, stirred for 15 mins, and anhydrous magnesium sulfate was added, stirring for an additional 15 mins. Solid materials were removed by filtration, washing multiple times with warm methylene chloride, and the filtrate concentrated under reduced pressure to give the desired product as a clear oil (4.5 g, 73%). 1H NMR (CDCl3, 300 MHz) δ 3.05-2.96 (quint, 1H, J=6.6 Hz), 2.74-2.71 (t, 2H, J=6.6 Hz), 2.68-2.58 (t, 2H, J=6.9 Hz), 1.85-1.68 (m, 2H), 1.62-1.42 (m, 6H), 1.34 (br s, 3H), 1.30-1.21 (m, 2H).

1. temperatureTo a cooled
2. temperatureat reflux for 4 hrs
3. temperaturecooled to room temperature
4. stirringstirred for 1 hr
5. temperatureThe mixture was cooled to 0° C.
6. additionwas added dropwise
7. temperatureThe resultant slurry was warmed to room temperature
8. stirringstirred for 15 mins
9. stirringstirring for an additional 15 mins
10. customSolid materials were removed by filtration
11. washwashing multiple times with warm methylene chloride
12. concentrationthe filtrate concentrated under reduced pressure