Hydrochloric Acid → HCID 22266516, compound

Participants

Reaction Steps

1-Butyl-2-oxo-1,2,5,6,7,8-hexahydroquinoline-3-carboxylic acid methyl ester (1-015-02) (263 mg, 1 mmol) was dissolved in ethanol (6 mL), and to the reaction mixture was added an aqueous solution of sodium hydroxide (2 mol/L, 0.6 mL, 1.2 mmol), and the reaction mixture was stirred at room temperature for 30 min. To the reaction mixture was added diluted hydrochloric acid (0.4 N, 6 mL) and the reaction mixture was extracted with ethyl acetate (25 mL). To the aqueous layer was added sodium chloride, followed by extraction with ethyl acetate (25 mL), and the combined organic layers were dried over anhydrous magnesium sulfate, and evaporated under reduced pressure. The obtained crystal residue was recrystallized from hexane to give 1-butyl-2-oxo-1,2,5,6,7,8-hexahydroquinoline-3-carboxylic acid (4-002-01) (220 mg, 88%) as a white crystal.

Provenance & Evidence