Hydrochloric Acid → N-methyl-1-(4-(1-methyl-1H-pyrazol-5-yl)phthalazin-1-yl)piperidin-4-amine

Participants

Reaction Steps

Dissolve tert-butyl methyl(1-(4-(1-methyl-1H-pyrazol-5-yl)phthalazin-1-yl)piperidin-4-yl)carbamate (7.77 g, 18.39 mmol) in dichloromethane (100 mL). Add an excess of 1 M hydrogen chloride in diethyl ether (20 mL, 80 mmol) to the solution and stir at ambient temperature for 2 h. Concentrate under reduced pressure. Purify the resulting residue by flash silica gel chromatography (dichloromethane:2 M NH3 in MeOH=10:1) to provide the title compound as a yellow foam (5.83 g, 98%). ES/MS m/z 323.2 (M+1).

Provenance & Evidence