Bromoacetic Acid → 7-(Chloroacetyl)-3-(trifluoromethyl)-5,6,7,8-tetrahydro[1,2,4]triazolo[4,3-a]pyrazine

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Reaktionsschritte

Bromoacetic acid (300 mg, 2.2 mmol) and 3-(trifluoromethyl)-5,6,7,8-tetrahydro[1,2,4]triazolo[4,3-a]pyrazine hydrochloride (490 mg, 2.2 mmol) were stirred in dichloromethane (5 mL) with N-(3-dimethylaminopropyl)-N′-ethylcarbodiimide hydrochloride (412 mg, 2.2 mmol) and N,N-diisopropylethylamine (560 mL, 3.2 μmol) for 3 hours at rt. The mixture was washed with water, dried over sodium sulfate and evaporated to give the desired compound in 33% yield. LCMS for C8H8ClF3N4O (M+H)+: m/z=269.0.

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