Water → HCID 15675232, compound

Participants

Reaction Steps

4-Benzyloxy-5-methoxy-3-methylindole (3.5 g) was dissolved in dimethylformamide (40 ml), and potassium t-butoxide (3.3 g) was added to the mixture. The resulting mixture was stirred at room temperature under a stream of oxygen for 5 days, poured into water and extraction with ethyl acetate was conducted. The extract was washed with saturated saline and dried over sodium sulfate, and the solvent was distilled off under reduced pressure. The residue was purified by silica gel column chromatography (Wako Gel C-200, 80 g). Elution with a mixed solvent of chloroform (92 parts) and methanol (8 parts) gave 5-benzyloxy-6-methoxy-4(1H)-quinolone (compound 4; 390 mg).

Provenance & Evidence