Water → octadecanoic acid 7-[4-(4-benzo[b]thiophen-4-ylpiperazin-1-yl)butoxy]-2-oxo-3,4-dihydro-2H-quinolin-1-ylmethyl ester

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Reaction Steps

To a solution (20 ml) of 7-[4-(4-benzo[b]thiophen-4-ylpiperazin-1-yl)butoxy]-1-hydroxymethyl-3,4-dihydro-1H-quinolin-2-one (640 mg, 2.066 mmol) synthesized in the same manner as in Example 1, stearic acid (587 mg, 2.062 mmol), 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (395 mg, 2.062 mmol) in methylene chloride was added 4-dimethylaminopyridine (33.6 mg, 0.275 mmol), and the mixture was stirred at room temperature overnight. Water was added to the reaction mixture, and the mixture was extracted with ethyl acetate. This was purified by moderate-pressure silica gel column chromatography (hexane:ethyl acetate=1:0 to 0:1) and further by basic silica gel column chromatography (hexane:ethyl acetate=1:0 to 0:1) and concentrated under reduced pressure to give the title compound (yield 649 mg, 64.5%) as a colorless oil.

Provenance & Evidence