Quinaldic Acid → HCID 22724513, compound

Participants

Reaction Steps

A mixture of 2-quinolinecarboxylic acid (520 mg) and 1,1′-carbonyldiimidazole (243 mg) in tetrahydrofuran (5 ml) was stirred at room temperature for 1.5 hours. A solution of 4-(3-aminophenyl)-3-oxo-2-benzyl-3,4-dihydropyrido[2,3-b]pyrazine (493 mg) in 1,4-dioxane (5 ml) was added to the mixture and stirring was continued for 5 days. The reaction mixture was poured into a mixture of ethyl acetate and an aqueous sodium bicarbonate solution. The organic phase was washed with brine, dried over magnesium sulfate, concentrated, and subjected to silica gel column chromatography (hexane-ethyl acetate, 1:1) to afford 2-benzyl-3-oxo-4-[3-(quinolin-2-yl)carbonylaminophenyl]-3,4-dihydropyrido[2,3-b]pyrazine (87 mg) as a solid.

Provenance & Evidence