Sodium Carbonate → (R)-tert-butyl 3-(4-amino-3-(4-(2,3-difluorophenoxy)-2-fluorophenyl)-1H-pyrazolo[3,4-d]pyrimidin-1-yl)piperidine-1-carboxylate

Participants

Reaction Steps

A solution of (R)-tert-butyl 3-(4-amino-3-iodo-1H-pyrazolo[3,4-d]pyrimidin-1-yl)piperidine-1-carboxylate (2.8 g, 6.16 mmol, 1.0 eq), 2-(4-(2,3-difluorophenoxy)-2-fluorophenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (1.7 g, 6.16 mmol, 1.0 eq), Pd(PPh3)4 (0.28 g, 0.08 mmol, 0.07 eq) and Na2CO3 (1.7 g, 15.4 mmol, 2.5 eq) in dioxane/H2O (40/10 mL) was stirred at 90° C. overnight. The reaction mixture was concentrated and purified by Pre-TLC to afford (R)-tert-butyl 3-(4-amino-3-(4-(2,3-difluorophenoxy)-2-fluorophenyl)-1H-pyrazolo[3,4-d]pyrimidin-1-yl)piperidine-1-carboxylate (1.7 g, 51.1% yield).

Provenance & Evidence