Hydrochloric Acid → 6-(1-(azetidin-3-yl)piperidin-3-yl)-3-methyl-1-phenyl-1H-pyrazolo[3,4-d]pyrimidin-4(5H)-one hydrochloride

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Reaction Steps

Into a 100-mL round-bottom flask, was placed a solution of tert-butyl 3-(3-(3-methyl-4-oxo-1-phenyl-4,5-dihydro-1H-pyrazolo[3,4-d]pyrimidin-6-yl)piperidin-1-yl)azetidine-1-carboxylate (200 mg, 0.43 mmol, 1.00 equiv) in hydrogen chloride (5 mL) at room temperature. The resulting solution was heated to reflux overnight. The resulting mixture was concentrated under vacuum. The resulting residue (150 mg) was purified by Prep-HPLC with the following conditions (Gilson Pre-HPLC): Column, SHISEIDO, CAPCELL PAK C18, 20 mm ID*250 mm, 5 u; mobile phase, methanol/H2O; Detector, UV 254 nm to yield 6-(1-(azetidin-3-yl)piperidin-3-yl)-3-methyl-1-phenyl-1H-pyrazolo[3,4-d]pyrimidin-4(5H)-one hydrochloride as a white solid.

Provenance & Evidence