反应详情

3-Trifluoromethyl-imidazo[1,5-a]pyrazine 1j (12.0 g, 64.2 mmol) was dissolved in 150 mL of anhydrous ethanol under stirring, then 10% Pd/C (500 mg) was added to the solution. The reaction mixture was stirred at room temperature under a hydrogen atmosphere overnight. The reaction solution was filtered through a pad of coarse silica gel and concentrated under reduced pressure to obtain the title compound 3-trifluoromethyl-5,6,7,8-tetrahydro-imidazo[1,5-a]pyrazine 1k (12.2 g, yield 99%) as a brown solid.

1. stirringThe reaction mixture was stirred at room temperature under a hydrogen atmosphere overnight
2. filtrationThe reaction solution was filtered through a pad of coarse silica gel
3. concentrationconcentrated under reduced pressure