Methyl iodide → 1,4-Dimethyl-7-(thiophen-3-yl)-1,2,5,6,7,8-hexahydroquinoline-2,5-dione

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Reaction Steps

To a solution of 4-methyl-7-(thiophen-3-yl)-1,2,5,6,7,8-hexahydroquinoline-2,5-dione (0.518 g) in dimethylformamide (5 ml) was added at room temperature 60% sodium hydride (0.08 g) and then was added methyl iodide (0.3 ml), and the mixture was stirred at room temperature for 4 hours. Under reduced pressure, the solvent was evaporated, and the residue was extracted with ethyl acetate. The organic layer was washed with water and concentrated under reduced pressure. The resulting crystals were washed with ethyl acetate to give 1,4-dimethyl-7-(thiophen-3-yl)-1,2,5,6,7,8-hexahydroquinoline-2,5-dione (0.405 g) as colorless crystals.

Provenance & Evidence