Methylamine → 1-(4-(4-(3-oxa-9-azabicyclo[3.3.1]nonan-9-yl)-1-(2,2,2-trifluoroethyl)-1H-pyrazolo[3,4-d]pyrimidin-6-yl)phenyl)-3-methylurea

Participants

Reaction Steps

A solution of 4-(4-(3-oxa-9-azabicyclo[3.3.1]nonan-9-yl)-1-(2,2,2-trifluoroethyl)-1H-pyrazolo[3,4-d]pyrimidin-6-yl)aniline (50 mg, 0.12 mmol) in dichloromethane (3 mL) was treated triethylamine (160 μL), followed by triphosgene (27 mg, 0.09 mmol) as a solution in dichloromethane (1 mL). After the passage of 5 minutes, the appropriate nucleophile—in the case, 2.0 M methylamine solution in tetrahydrofuran (1.2 mL)—was added to the 9-(6-(4-isocyanatophenyl)-1-(2,2,2-trifluoroethyl)-1H-pyrazolo[3,4-d]pyrimidin-4-yl)-3-oxa-9-azabicyclo[3.3.1]nonane (“isocyanate”) mixture. The reaction mixture was concentrated to dryness under reduced pressure. The residue was purified by reverse-phase high performance liquid chromatography using a Phenomenex Prodigy 21 mm×250 mm column, running a gradient elution of 10% acetonitrile/90% of 0.1% aqueous trifluoroacetic acid to 100% acetonitrile to provide 1-(4-(4-(3-oxa-9-azabicyclo[3.3.1]nonan-9-yl)-1-(2,2,2-trifluoroethyl)-1H-pyrazolo[3,4-d]pyrimidin-6-yl)phenyl)-3-methylurea. MS (ES+): 476.3 (M+H)+

Provenance & Evidence