Triethylamine → N-{[3-(4-fluorophenyl)isoxazol-5-yl]methyl}-3-nitro[1,5]naphthyridin-4-amine

Participants

Reaction Conditions

Reaction Steps

Under a nitrogen atmosphere, 4-fluoro-N-hydroxybenzenecarboximidoyl chloride (7.6 g, 44 mmol) was added to a heated solution (40° C.) of 3-nitro-N-prop-2-ynyl[1,5]naphthyridin-4-amine (5.0 g, 22 mmol) and anhydrous triethylamine (6.7 mL, 48 mmol) in anhydrous dichloromethane (150 mL). The reaction was heated at 40° C. for 1.7 hours and then concentrated under reduced pressure. The residue was triturated with water; the resulting solid was isolated by filtration, washed sequentially with toluene and a small amount of diethyl ether, and then dissolved in dichloromethane. The solution was concentrated under reduced pressure and dried under high vacuum to provide 6.00 g of N-{[3-(4-fluorophenyl)isoxazol-5-yl]methyl}-3-nitro[1,5]naphthyridin-4-amine as a brownish-yellow solid.

Provenance & Evidence