Trifluoroacetic acid → HCID 66980615, compound

Participants

Reaction Conditions

Reaction Steps

A flask was charged with 1-(7-benzyl-5,6,7,8-tetrahydroimidazo[1,5-a]pyrazin-3-yl)-N-(2,4-dimethoxybenzyl)methanamine (1.0 g, 2.6 mmol, prepared using H from 7-benzyl-5,6,7,8-tetrahydroimidazo[1,5-a]pyrazine-3-carbaldehyde [WO 03/076427, Preparation 138] with 2,4-dimethoxybenzylamine), DCM (20 mL) and TFA (10 mL). To the mixture was added triethylsilane (0.50 mL, 3.1 mmol) and the mixture was heated to about 55° C. for about 6 h. The solvents were removed under reduced pressure to give (7-benzyl-5,6,7,8-tetrahydroimidazo[1,5-a]pyrazin-3-yl)methanamine 2,2,2-trifluoroacetate (1.6 g) as a crude material that was used directly without further purification: LC/MS (Table 2, Method h) Rt=1.65 min; MS m/z: 243 (M+H)+.

Provenance & Evidence