Acetylacetone → 3-Isopropyl-5,7-dimethylpyrazolo[1,5-a]pyrimidin-2-amine

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Reaction Steps

A solution of acetylacetone (1034 mg, 10.33 mmol) and the product from Example 112B (965 mg, 6.88 mmol) in acetic acid (5 mL) was heated at 115° C. for 90 minutes, and then cooled to room temperature. Hydroxylamine hydrochloride (520 mg) was added, and the solution was stirred at room temperature for 14 hours, and then concentrated under vacuum. The residue was purified by HPLC (30×100 mm XBridge column eluted with 0.1 M aqueous (NH4)2CO3-MeOH, 60:40-0:100 over 15 min) to provide the title compound. MS (DCI/NH3) m/z 205 (M+H)+.

Provenance & Evidence