Potassium Carbonate → HCID 86706939, compound

Participants

Reaction Steps

To a solution of 4-chloro-5-iodo-7-{[2-(trimethylsilyl)ethoxy]methyl}-7H-pyrrolo[2,3-d]pyrimidine (C1) (4.1 g, 10 mmol), 1-methyl-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazole (2.1 g, 10 mmol) and potassium carbonate (2.8 g, 20 mmol) in aqueous 1,4-dioxane was added dichlorobis(triphenylphosphine)palladium(II) (350 mg, 0.50 mmol). The reaction mixture was degassed and purged with nitrogen; this procedure was carried out a total of three times. After heating at reflux for 18 hours, the reaction mixture was cooled to room temperature, diluted with water (200 mL) and extracted with ethyl acetate (3×200 mL). The combined organic layers were washed with saturated aqueous sodium chloride solution (500 mL), dried over sodium sulfate, filtered, and concentrated in vacuo. Purification by chromatography on silica gel (Gradient: 0% to 10% ethyl acetate in petroleum ether) afforded the product as a white solid. Yield: 2.0 g, 5.5 mmol, 55%. 1H NMR (400 MHz, CDCl3) δ 8.66 (s, 1H), 7.68 (d, J=0.5 Hz, 1H), 7.62 (br s, 1H), 7.36 (s, 1H), 5.68 (s, 2H), 3.99 (s, 3H), 3.54-3.59 (m, 2H), 0.91-0.97 (m, 2H), −0.03 (s, 9H).

Provenance & Evidence