Sodium Carbonate → HCID 59506950, compound

Participants

Reaction Steps

To a solution of N-{5-[(2-amino[1,3]thiazolo[5,4-b]pyridin-5-yl)oxy]-4-chloro-2-fluorophenyl}-3-(1-cyano-1-methylethyl)benzamide (100 mg, 0.207 mmol) produced in Example C52(v) in pyridine (2.0 mL) was added acetoxyacetyl chloride (48.9 μL, 0.455 mmol), and the mixture was stirred at room temperature for 4 hr. The reaction mixture was diluted with ethyl acetate (10 mL), washed with 5% aqueous sodium hydrogen carbonate solution (10 mL) and saturated brine (10 mL), and dried over anhydrous sodium sulfate. The insoluble material was filtered off, and the filtrate was concentrated under reduced pressure. The obtained residue was dissolved in methanol (2.0 mL), sodium carbonate (100 mg, 0.943 mmol) was added, and the mixture was stirred at room temperature for 2 hr. The reaction mixture was concentrated under reduced pressure, and the residue was suspended in ethyl acetate (10 mL). The obtained suspension was washed with 5% aqueous ammonium chloride solution (10 mL), 5% aqueous sodium hydrogen carbonate solution (10 mL) and saturated brine (10 mL), and dried over anhydrous sodium sulfate. The insoluble material was filtered off, and the filtrate was concentrated under reduced pressure. The residue was purified by basic silica gel column chromatography (ethyl acetate/methanol=100/0→85/15), and the obtained solution was concentrated under reduced pressure. The residue was recrystallized from ethyl acetate/hexane to give the title compound (63.0 mg, 56%) as a colorless powder.

Provenance & Evidence