Methanesulfonic Acid → 7-Methoxy-4-(2-methyl-quinolin-3-yloxy)-quinolin-6-ol

Participants

Reaction Conditions

Reaction Steps

Trifluoroacetic acid (5 ml) and methanesulfonic acid (0.2 ml) were added to 6-benzyloxy-7-methoxy-4-(2-methyl-quinolin-3-yloxy)-quinoline (compound 415) (700 mg), and the mixture was stirred at 100° C. for 2 hr. The reaction solution was cooled to room temperature, and the solvent was then removed by distillation under the reduced pressure. A saturated aqueous sodium hydrogencarbonate solution was added to the residue, and the mixture was extracted with chloroform. The chloroform layer was washed with a saturated aqueous sodium hydrogencarbonate solution and water and was then dried over anhydrous magnesium sulfate. The solvent was removed by distillation under the reduced pressure, and the residue was purified by column chromatography using chloroform-methanol to give 7-methoxy-4-(2-methyl-quinolin-3-yloxy)-quinolin-6-ol (26 mg, yield 5%).

Provenance & Evidence