Trifluoroacetic acid → 3-[4-(2,6-difluorophenoxy)phenyl]-1-[(3R)-piperidin-3-yl]-1H-pyrazolo[3,4-d]pyrimidin-4-amine

Into a 100 mL round-bottom flask, was placed a solution of tert-butyl (3R)-3-[4-amino-3-[4-(2,6-difluorophenoxy)phenyl]-1H-pyrazolo[3,4-d]pyrimidin-1-yl]piperidine-1-carboxylate (450 mg, 0.86 mmol, 1.00 equiv) in dichloromethane (40 mL). CF3COOH (10 mL) to added dropwise with stirring at 25° C. over 10 min and the resulting solution was stirred for 3 h at 25° C. and then concentrated under vacuum. The resulting solution was diluted with dichloromethane and washed with aqueous sodium bicarbonate and brine. The organics were dried over anhydrous sodium sulfate and concentrated under vacuum to give 410 mg of 3-[4-(2,6-difluorophenoxy)phenyl]-1-[(3R)-piperidin-3-yl]-1H-pyrazolo[3,4-d]pyrimidin-4-amine as a white solid.

1. customInto a 100 mL round-bottom flask, was placed
2. stirringthe resulting solution was stirred for 3 h at 25° C.
3. concentrationconcentrated under vacuum
4. additionThe resulting solution was diluted with dichloromethane
5. washwashed with aqueous sodium bicarbonate and brine
6. dry with materialThe organics were dried over anhydrous sodium sulfate
7. concentrationconcentrated under vacuum

ORD record

ord-8145116a617541a5b9ace7923efc71a8

Source dataset

uspto-grants-2015_07

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US09090621B2