Diethyl Malonate → Ethyl (6-methoxy-3-pyridinyl)-2-oxo-1,2-dihydro-1,8-naphthyridine-3-carboxylate

Participants

Reaction Conditions

Reaction Steps

6.4 g (28 mmol) of 2-(6-methoxy-3-pyridinylamino)nicotinaldehyde was dissolved in ethanol (50 mL), and 6.7 g (42 mmol) of diethyl malonate and 0.95 g (11 mmol) of piperidine were added thereto. The resulting mixture was stirred for 4 hours at 100° C. The solvent was distilled off under reduced pressure from the reaction mixture, and the residue was washed with a mixed solution of ethyl acetate and diisopropyl ether. Thus, 4.1 g of the title compound was obtained as a pale yellow solid (yield: 45%).

Provenance & Evidence