Dimethylformamide → 1-Benzyl-8-methoxy-2-oxo-1,2,3,4-tetrahydroquinoline-5-carboxaldehyde

Participants

Reaction Steps

Sodium hydride (60% in oil) (1.07 g) was added at 0° C. to a DMF solution (50 ml) of 8-methoxy-2-oxo-1,2,3,4-tetrahydroquinoline-5-carboxaldehyde (5.0 g), followed by stirring for 30 minutes. Benzyl bromide (3.47 ml) was added, and the resulting mixture was stirred at room temperature for 1 hour. Water was added to the reaction mixture, and extraction with ethyl acetate was performed. The extract was washed with a saturated sodium chloride solution, dried over anhydrous magnesium sulfate, and concentrated under reduced pressure. The residue was recrystallized from an ethyl acetate-n-hexane mixed solvent to thereby obtain 6.6 g (yield: 92%) of 1-benzyl-8-methoxy-2-oxo-1,2,3,4-tetrahydroquinoline-5-carboxaldehyde as a white powder.

Provenance & Evidence