Hydrochloric Acid → HCID 66596834, compound

Participants

Reaction Conditions

Reaction Steps

8-Methoxy-1-methyl-2-oxo-1,2-dihydroquinoline-5-carboxaldehyde (18.9 g), diethyl malonate (26.5 ml) and piperidine (2.7 ml) were added to pyridine (90 ml), and the resulting mixture was stirred at 90 to 100° C. for 6 hours. After cooling to room temperature, the reaction mixture was added to cold concentrated hydrochloric acid, and the precipitated solid was collected by filtration, washed with water and dried to thereby obtain 16.62 g (yield: 53%) of diethyl 2-(8-methoxy-1-methyl-2-oxo-1,2-dihydroquinolin-5-ylmethylene)malonate as a yellow powder.

Provenance & Evidence