Hydrochloric Acid → 7-[(3R)-3-Amino-4-(3,4-difluorophenyl)butanoyl]-5,6,7,8-tetrahydroimidazo[1,2-a]pyrazine, dihydrochloride

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Reaction Steps

The title compound was prepared from 7-[(3R)-3-[(1,1-dimethylethoxycarbonyl)amino]-4-(3,4-difluorophenyl)butanoyl]-5,6,7,8-tetrahydroimidazo[1,2-α]pyrazine (72 mg, 0.171 mmol, from Step C), in 1.5 mL of methanol saturated with hydrogen chloride, using a procedure analogous to that described in Example 1, Step D. Concentration gave 66 mg of the title compound as a foamy solid. 1H NMR (500 MHz, CD3OD) δ 2.96-3.13 (m, 4H), 3.93 (m, 1H), 4.13 (m, 2H), 4.26-4.38 (m, 2H), 4.26-4.38 (m, 2H), 4.90-5.04 (m, 2H), 7.19-7.36 (m, 3H), 7.58 (m, 1H). ESI-MS 321 (M+1).

Provenance & Evidence