Dichloromethane → 5-(1-methyl-1H-pyrazol-4-yl)-3-phenyl-1-(tetrahydro-2H-pyran-2-yl)-1H-pyrazolo[3,4-c]pyridine

Participants

Reaction Steps

In a microwave vial was charged with 5-bromo-3-phenyl-1-(tetrahydro-2H-pyran-2-yl)-1H-pyrazolo[3,4-c]pyridine (500 mg, 1.39 mmol), 1-methyl-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazole (435.6 mg, 2.09 mmol), potassium acetate (205.5 mg, 2.09 mmol), sodium carbonate (221.9 mg, 2.09 mmol), and bis(diphenylphosphino)ferrocene]dichloropalladium (II), complexed with dichloromethane (1:1) (108.3 mg, 0.13 mmol). Degassed acetonitrile (10.5 mL) and water (2.6 mL) were added. Nitrogen was passed through the mixture for 15 minutes and the vial was capped. The reaction mixture was subjected to microwave irradiation at 125° C. for 25 min. The reaction mixture was filtered through a pad of Celite® and diluted with water and EtOAc. The organic layer was washed with brine, dried over Na2SO4, filtered, and concentrated under reduced pressure. The crude product was purified using flash chromatography (Si-PPC gradient elution, solvent: 60-100% ethyl acetate in heptanes, followed by 0-30% methanol in ethyl acetate) to give 5-(1-methyl-1H-pyrazol-4-yl)-3-phenyl-1-(tetrahydro-2H-pyran-2-yl)-1H-pyrazolo[3,4-c]pyridine as a foam (340.0 mg, 67.8%). 1H NMR (400 MHz, CDCl3) δ 9.15 (s, 1H), 8.07-7.94 (m, 5H), 7.54 (t, J=7.6 Hz, 2H), 7.45 (t, J=7.4 Hz, 1H), 5.88 (dd, J=8.8, 2.2 Hz, 1H), 4.06 (dd, J=11.8, 4.0 Hz, 1H), 3.98 (s, 3H), 3.86-3.76 (m, 1H), 2.66-2.52 (m, 1H), 2.19 (d, J=10.8 Hz, 2H), 1.89-1.67 (m, 3H). LC/MS: m/z 378.3 [M+1]

Provenance & Evidence