Water → 6-Cyano-4-(1H-indol-5-yloxy)-7-[(1-(t-butoxycarbonyloxy)piperidin-4-yl)methyloxy]quinoline

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Reaction Conditions

Reaction Steps

After dissolving 6-cyano-4-(1H-indol-5-yloxy)-7-hydroxyquinoline (1.72 g, 5.7084 mmol) in N,N-dimethylformamide (20 ml), there were added potassium carbonate (0.87 g, 6.2792 mmol) and tert-butyl4-bromomethylpiperidine-1-carboxylate (1.75 g, 6.2792 mmol), and the mixture was heated and stirred at 70° C. for 7 hours. After allowing it to cool to room temperature, water was added, extraction was performed with ethyl acetate and tetrahydrofuran, the extract was washed with saturated brine and dried over anhydrous magnesium sulfate and the solvent was distilled off under reduced pressure, after which the residue was adsorbed onto silica gel. Purification was performed by silica gel column chromatography (hexane/ethyl acetate system), and then ethyl acetate/ethanol/hexane was added to the obtained yellow oil to precipitate crystals. The crystals were filtered out, washed with hexane:ethanol=10:1 and dried by aspiration to obtain the title compound (1.786 g, 3.3852 mmol, 59.30%) as light yellow crystals.

Provenance & Evidence