Acetic Anhydride → N-{[(1S,2S)-2-(2-methylpyrazolo[1,5-a]pyridin-4-yl)cyclopropyl]methyl}acetamide

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Reaction Steps

To a suspension of 1-[(1S,2S)-2-(2-methylpyrazolo[1,5-a]pyridin-4-yl)cyclopropyl]methanamine dihydrochloride (750 mg, 2.74 mmol) and triethylamine (1.52 mL, 10.9 mmol) in tetrahydrofuran (27 mL) was added acetic anhydride (388 μL, 4.10 mmol), and the mixture was stirred at room temperature for 14 hr. The reaction solution was concentrated under reduced pressure and the residue was purified by silica gel column chromatography (methanol/ethyl acetate=0/100→10/90) to give the title compound (623 mg, yield 93%).

Provenance & Evidence