Sodium Carbonate → {2-hydroxy-5-[3-(2-methoxy-phenyl)-1-(2-trimethylsilanyl-ethoxymethyl)-1H-pyrazolo[3,4-b]pyridin-5-yl]-phenyl}-morpholin-4-yl-methanone

Participants

Reaction Steps

A mixture of 3-(2-methoxy-phenyl)-5-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)-1-(2-trimethylsilanyl-ethoxymethyl)-1H-pyrazolo[3,4-b]pyridine (100 mg, 0.21 mmol), (5-bromo-2-hydroxy-phenyl)-morpholin-4-yl-methanone (66 mg (0.23 mmol) and 1,1′-bis(diphenylphosphino)ferrocenepalladium(II)-dichloride dichlormethane adduct (9 mg, 11 μmol) in acetonitrile (2 mL) and aqueous solution of sodium carbonate (2M, 2 mL) was irradiated in a Personal Chemistry Optimizer at 135° C. for 20 min. The crude reaction mixture was distributed between dichloromethane and a saturated aqueous solution of sodium bicarbonate. The aqueous phase was then extracted with dichloromethane and the combined organic phases were dried over sodium sulfate, filtered and concentrated. The crude product was then purified by flash silica gel chromatography using a gradient of ethyl acetate in hexanes to afford {2-hydroxy-5-[3-(2-methoxy-phenyl)-1-(2-trimethylsilanyl-ethoxymethyl)-1H-pyrazolo[3,4-b]pyridin-5-yl]-phenyl}-morpholin-4-yl-methanone (35 mg, 30% yield) as a colorless solid. 1H-NMR (500 MHz, d6-DMSO) δ 8.86 (d, 1H), 8.27 (d, 1H), 7.64 (dd, 1H), 7.62 (dd, 1H), 7.54 (d, 1H), 7.49 (ddd, 1H), 7.24 (d, br, 1H), 7.11 (ddd, 1H), 7.00 (d, 1H), 5.84 (s, 2H), 3.84 (s, 3H), 3.69 (t, 2H), 3.7-3.2 (m, 8H), 0.86 (t, 2H), −0.08 (s, 9H). MS: m/z 583 [MNa+], 561 [MH+], 443 [MH+-(Me3Si(CH2)2O)]

Provenance & Evidence