Triethylamine → 2-Hydroxyethyl(4-{4-[(1s,4s)-2-oxa-5-azabicyclo[2.2.1]hept-5-yl]-1-(2,2,2-trifluoroethyl)-1h-pyrazolo[3,4-d]pyrimidin-6-yl}phenyl)carbamate

Participants

Reaction Steps

A solution of 4-(4-((1S,4S)-2-oxa-5-azabicyclo[2.2.1]heptan-5-yl)-1-(2,2,2-trifluoroethyl)-1H-pyrazolo[3,4-d]pyrimidin-6-yl)aniline (26 mg, 0.07 mmol) in dichloromethane (2 mL) was treated with triethylamine (86 μL), followed by a solution of triphosgene (10 mg, 0.03 mmol) in dichloromethane (1 mL). After the passage of 20 minutes, the appropriate nucleophile—in the case, ethylene glycol (excess)—was added to the (1S,4S)-5-(6-(4-isocyanatophenyl)-1-(2,2,2-trifluoroethyl)-1H-pyrazolo[3,4-d]pyrimidin-4-yl)-2-oxa-5-azabicyclo[2.2.1]heptane (“isocyanate”) mixture. After standing overnight at room temperature, 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 15% acetonitrile/85% of 0.1% aqueous trifluoroacetic acid to 88% acetonitrile to provide 2-hydroxyethyl(4-{4-[(1S,4S)-2-oxa-5-azabicyclo[2.2.1]hept-5-yl]-1-(2,2,2-trifluoroethyl)-1H-pyrazolo[3,4-d]pyrimidin-6-yl}phenyl)carbamate. MS (ES+): 479.2 (M+H)+

Provenance & Evidence