Water → N-[(4,6-Dimethyl-2-oxo-1,2-dihydro-3-pyridinyl)methyl]-3-methyl-6-{4-[(methylamino)sulfonyl]phenyl}-1-(1-methylethyl)-1H-pyrazolo[3,4-b]pyridine-4-carboxamide

Participants

Reaction Steps

6-Chloro-N-[(4,6-dimethyl-2-oxo-1,2-dihydro-3-pyridinyl)methyl]-3-methyl-1-(1-methylethyl)-1H-pyrazolo[3,4-b]pyridine-4-carboxamide (80 mg, 0.21 mmol), {4-[(methylamino)sulfonyl]phenyl}boronic acid (66.5 mg, 0.31 mmol) and bis(triphenylphosphine)palladium(II) chloride (8.4 mg, 0.01 mmol) were suspended in DME/water (4 mL, 3:1) and stirred for 10 min under nitrogen at room temperature. Sodium bicarbonate (52 mg, 0.62 mmol) was added and the heterogenous mixture was irradiated (microwave) at 150° C. for 30 min. After cooling to room temperature, water was added to the black mixture, and the contents were vacuum filtered. The crude product was dissolved in DCM/MeOH (1:1) and preabsorbed onto silica gel. The product was purified by silica gel chromatography (eluent: DCM/MeOH/NH4OH, gradient of 0 to 90:10:1). The light beige solid that was collected was suspended in EtOH, sonicated, and filtered. The solid was then air-dried for 15 min, and then in vacuum oven overnight. The final product was collected as 77 mg (70%). LCMS E-S (M+H)=523.2 1H NMR (400 MHz, DMSO-d6) δ ppm 11.54 (br. s., 1 H) 8.78 (t, J=5.05 Hz, 1 H) 8.43 (m, J=8.59 Hz, 2 H) 7.93 (m, J=8.59 Hz, 2 H) 7.78 (s, 1 H) 7.58 (br. s., 1 H) 5.89 (s, 1 H) 5.29 (quin, J=6.63 Hz, 1 H) 4.40 (d, J=4.80 Hz, 2 H) 2.46 (d, J=1.26 Hz, 6 H) 2.25 (s, 3 H) 2.12 (s, 3 H) 1.52 (s, 3 H) 1.51 (s, 3 H).

Provenance & Evidence