126069-70-3

109113-96-4

126069-70-3

The general procedure for the synthesis of 2-trifluoromethyl-5,6,7,8-tetrahydroimidazo[1,2-A]pyrazine using 2-trifluoromethylimidazo[1,2-a]pyrazine as a starting material was as follows: 2-trifluoromethylimidazo[1,2-a]pyrazine (2.40 g, 12.55 mmol) was dissolved in methanol (100 mL) with 10% Pd/C catalyst (480 mg ). The reaction system was displaced three times with hydrogen to ensure an oxygen-free environment. After stirring the reaction for 12 h at room temperature, the catalyst was removed by filtration and the filter cake was washed with methanol. The filtrates were combined and concentrated under reduced pressure to afford 2-trifluoromethyl-5,6,7,8-tetrahydroimidazo[1,2-a]pyrazine (2.30 g, 95.8% yield) as a yellow oil.