Tetrahydrofuran → HCID 57677621, compound

Participants

Reaction Steps

To a solution of 1-[4-(2-aminopyridin-4-yloxy)-2-fluorophenyl]-3-(2-phenylacetyl)thiourea (270 mg) in tetrahydrofuran (12 ml) was added triethylamine (0.142 ml), and then phenyl chloroformate (0.160 ml) was added while stirring in an ice bath, followed by stirring under a nitrogen atmosphere for 30 min. One third of the solution was concentrated under a reduced pressure, and then N,N-dimethylformamide (1.5 ml) and piperidine (0.112 ml) were added thereto, followed by stirring at room temperature for 5 hrs. The reaction mixture was partitioned between ethyl acetate (40 ml) and water (40 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=1:1, then ethyl acetate). Fractions containing the target compound were concentrated to give a solid, which was suspended in diethyl ether. The solid was filtered off, washed with diethyl ether, and dried under aeration to provide the titled compound (50 mg) as pale brown powder.

Provenance & Evidence