1,3-Diethyl 2-oxopropanedioate → HCID 67532786, compound

Participants

Reaction Steps

5.2 g (24 mmol) of 3-amino-2-(4-methoxyphenyl)aminopyridine was dissolved in ethanol (150 mL), and 4.6 g (27 mmol) of diethyl ketomalonate was added thereto. The mixture was heated to reflux for 9 hours while stirring. After confirming the completion of the reaction, the reaction solution was cooled to room temperature, and the solvent was distilled off under reduced pressure. The residue thus obtained was purified by column chromatography (developing solvent:ethyl acetate:hexane=1:2), to obtain 2.9 g (yield: 37%) of ethyl 4-(4-methoxyphenyl)-3-oxo-3,4-dihydropyrido[2,3-b]pyrazine-2-carboxylate as yellow crystals.

Provenance & Evidence