Trifluoroacetic acid → 7-methoxy-4-methyl-1-(2-(4-oxocyclohexyl)ethyl)quinolin-2(1H)-one

Participants

Reaction Steps

To 1.5 mL of an ethanol solution containing 65 mg of 1-(2-(1,4-dioxaspiro[4.5]decan-8-yl)ethyl)-7-methoxy-4-methylquinolin-2(1H)-one, 0.5 mL of an 80% aqueous trifluoroacetic acid solution was added under cooling with ice, and the mixture was stirred at room temperature for 3 hours. The solvent was removed under reduced pressure, and water and ethyl acetate were added thereto. The reaction mixture was adjusted to pH 7.7 with an aqueous saturated sodium hydrogen carbonate solution. The organic layer was separated, washed with an aqueous saturated sodium chloride solution and then dried over anhydrous magnesium sulfate, and the solvent was removed under reduced pressure to obtain 48 mg of a colorless oily substance, 7-methoxy-4-methyl-1-(2-(4-oxocyclohexyl)ethyl)quinolin-2(1H)-one.

Provenance & Evidence