Ethanol → Pyrrolidine-1-carboxylic acid (4-{2-methyl-4-[3-(4-fluorophenyl)acetylthioureido]phenoxy}pyridin-2-yl)amide

Participants

Reaction Conditions

Reaction Steps

To a solution of 2-(4-fluorophenyl)acetyl chloride (66.3 mg) in acetonitrile (30 ml) was added potassium thiocyanate (37.3 mg), followed by stirring under a nitrogen atmosphere at 50° C. for 1 hr. The reaction mixture was cooled down to room temperature, and then pyrrolidine-1-carboxylic acid [4-(4-amino-2-methylphenoxy)pyridin-2-yl]amide (80 mg) was added thereto, followed by stirring under a nitrogen atmosphere for 2 hrs. The reaction mixture was partitioned between ethyl acetate (100 ml) and water (60 ml). The organic layer was washed with brine, and dried over anhydrous sodium sulfate. The solvent was evaporated to give a residue, which was then purified by silica gel column chromatography (eluent; hexane:ethyl acetate=1:3, then ethyl acetate). Fractions containing the target compound were concentrated to give a residue, to which diethyl ether was then added and concentrated under a reduced pressure again to give a solid. The resultant solid was then suspended in diethyl ether (4 ml)-ethanol (0.4 ml), filtered off, washed with diethyl ether, and dried under aeration to provide the titled compound (15 mg, 11.5%) as colorless powder.

Provenance & Evidence