Tetronic acid → HCID 57908390, compound

Participants

Reaction Steps

0.52 g (5.18 mmol) of tetronic acid is initially charged in 1.13 ml of acetic acid, and 1.00 g (4.93 mmol) of N-[(6-chloropyridin-3-yl)methyl]-3-fluoropropane-1-amine (III-2) is added slowly at room temperature. The entire reaction mixture is then stirred at room temperature for approximately a further 18 hours. The reaction mixture is concentrated under reduced pressure, the residue is then taken up in dichloromethane and the mixture is washed with water. After phase separation, the aqueous phase is extracted twice with dichloromethane. The combined organic phases are then made alkaline (pH>9) with 1 N sodium hydroxide solution and the phases are separated. The aqueous phase is extracted twice with dichloromethane, and, after phase separation, the combined organic phases are dried over sodium sulphate. Concentration of the organic phase under reduced pressure and purification of the residue by column chromatography on silica gel (silica gel 60—Merck, particle size: 0.04 to 0.063 mm) using the mobile phase mixture ethyl acetate:cyclohexane (9:1) gives 191 mg (14% of theory) of 4-[[(6-chloropyridin-3-yl)methyl](3-fluoro-n-propyl)amino]furan-2(5H)-one.

Provenance & Evidence