N-methyl-2-pyrrolidone → HCID 58451281, compound

Participants

Reaction Steps

To a solution of benzyl [3-({2-[(cyclopropylcarbonyl)amino][1,3]thiazolo[5,4-b]pyridin-5-yl}oxy)-4-methylphenyl]carbamate (14.4 g, 30.3 mmol) produced in Example 33(v) in ethanol (300 mL)/1-methylpyrrolidin-2-one (100 mL) were added 10% palladium carbon (27.3 g, 25.7 mmol) and ammonium formate (61.9 g, 909 mmol), and the mixture was stirred at room temperature for 5 days under a hydrogen atmosphere (1 atm). The insoluble material was filtered off through a celite pad, and the filtrate was concentrated under reduced pressure. To the obtained solution in 1-methylpyrrolidin-2-one was added water (300 ml), and the precipitated solid was collected by filtration and washed with water (500 mL). The solid collected by filtration was dissolved in a mixture of tetrahydrofuran (800 mL)/ethyl acetate (800 mL), washed with saturated brine (2×400 mL), dried over anhydrous sodium sulfate, and concentrated under reduced pressure. The obtained residue was washed successively with a mixture of tetrahydrofuran (10 mL)/diisopropyl ether (10 mL) and diisopropyl ether (40 mL) to give the title compound (7.29 g, 71%) as a white solid.

Provenance & Evidence