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ChemicalBook CAS DataBase List 3-(trifluoroMethyl)-5,6,7,8-tetrahydroiMidazo[1,5-a]pyrazine

3-(trifluoroMethyl)-5,6,7,8-tetrahydroiMidazo[1,5-a]pyrazine synthesis

3synthesis methods
-

Yield:959238-29-0 99%

Reaction Conditions:

with hydrogen;palladium 10% on activated carbon in ethanol at 20;

Steps:

1.9 3-Trifluoromethyl-5,6,7,8-tetrahydro-imidazo[1,5-a]pyrazine

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. 1H NMR (400 MHz, CDCl3): δ 6.84 (s, 1H), 4.10 (m, 4H), 3.26 (m, 2H), 1.81 (s, 1H)

References:

EP2230241,2010,A1 Location in patent:Page/Page column 19