1-Methyl-4-(piperidin-4-yl)piperazine → HCID 68496027, compound

Participants

Reaction Conditions

Reaction Steps

1-Methyl-4-(piperidin-4-yl)piperazine (1.46 g) was added to a mixture of 1-[2-fluoro-4-(2-phenoxycarbonylaminopyridin-4-yloxy)phenylcarbamoyl]cyclopropanecarboxylic acid benzyl ester (3.60 g) and N-methyl-2-pyrrolidone (25 ml), followed by stirring with heating at 40° C. for 1 hour and 51 minutes. The reaction mixture was partitioned after the addition of ethyl acetate (180 mL) and water (90 mL). The resultant organic layer was washed with water (36 ml, twice) and a 10% aqueous solution of sodium chloride (36 ml), dried over anhydrous magnesium sulfate (10 g), and filtered, and the filtrate was concentrated. The resultant residue was purified by silica gel column chromatography (Fuji Silysia NH, eluent; heptane:ethyl acetate=1:1, ethyl acetate, ethyl acetate:isopropyl alcohol=9:1). The eluate was concentrated under reduced pressure, and the precipitate appeared after the addition of tert-butyl methyl ether (60 ml) and seed crystals obtained in (Method 1). The resultant precipitate was collected by filtration, washed with tert-butyl methyl ether (10 ml), and dried under reduced pressure at 40° C. for 2 hours to give the target title compound (2.57 g).

Provenance & Evidence