Cyclopropanecarbonyl chloride → N-[4-chloro-5-({2-[(cyclopropylcarbonyl)amino][1,3]thiazolo[5,4-b]pyridin-5-yl}oxy)-2-fluorophenyl]-3-(1-cyano-1-methylethyl)benzamide

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 (400 mg, 0.83 mmol) produced in Example C52(v) in pyridine (4.0 mL) was added cyclopropanecarbonyl chloride (112 μL, 1.24 mmol), and the mixture was stirred at room temperature for 6 hr. Cyclopropanecarbonyl chloride (112 μL, 1.24 mmol) was further added, and the mixture was stirred at room temperature for 2 hr. The reaction mixture was diluted with ethyl acetate (100 mL), washed with 5% aqueous sodium hydrogen carbonate solution (100 mL) and saturated brine (100 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 purified by basic silica gel column chromatography (hexane/ethyl acetate=70/30→0/100), and the obtained solution was concentrated under reduced pressure. The residue was crystallized from ethyl acetate/hexane to give the title compound (190 mg, 44%) as a colorless powder.

Provenance & Evidence