Hydrochloric Acid → HCID 22175341, compound

Participants

Reaction Steps

To a solution of 4-butoxy-7-fluoro-2-neopentyl-1-oxo-1,2-dihydro-3-isoquinolinecarboxylate (3.40 g, 9 mmol) in tetrahydrofuran (20 ml) and ethanol (20 ml) was added sodium hydroxide (1.08 g, 27 mmol). The obtained mixture was refluxed under heating for 3 h. The reaction mixture was pouted into water, and, after making the mixture acidic with 1N hydrochloric acid, extracted with ethyl acetate. The extract was washed with brine, dried over anhydrous magnesium sulfate and concentrated under reduced pressure. The obtained crystals were recrystallized from tetrahydrofuran-diisopropyl ether to give 4-butoxy-7-fluoro-2-neopentyl-1-oxo-1,2-dihydro-3-isoquinolinecarboxylic acid (3.04 g, 96.8%) as crystals.

Provenance & Evidence