反应详情

A 250-mL round-bottomed flask was charged with (3S)-3-(tetrahydro-2H-pyran-4-ylmethyl)-2,5-piperazinedione (1.44 g, 6.78 mmol), 50 mL of THF, and LAH (1M in THF, 27.1 mL, 27.1 mmol, Sigma-Aldrich, St. Louis, Mo.). After heating at reflux for 2 h, the mixture was allowed to cool to room temperature. Sodium sulfate decahydrate (10 g) was then added and the mixture was stirred at temperature for 1 h. The mixture was filtered and the filtrate was concentrated to give (2S)-2-(tetrahydro-2H-pyran-4-ylmethyl)piperazine (0.950 g, 5.16 mmol) as a colorless oil.

1. temperatureAfter heating
2. temperatureat reflux for 2 h
3. filtrationThe mixture was filtered
4. concentrationthe filtrate was concentrated