Hydrochloric Acid → 8-(4-(2-Butoxyethoxy)phenyl)-1-(2-methyl-2-propen-1-yl)-1,2,3,4-tetrahydro-1-benzoazocine-5-carboxylic acid

Participants

Reaction Conditions

Reaction Steps

To methyl 8-(4-(2-butoxyethoxy)phenyl)-1-(2-methyl-2-propen-1-yl)-1,2,3,4-tetrahydro-1-benzoazocine-5-carboxylate (1.65 g) were added tetrahydrofuran (45 ml) and methanol (45 ml), followed by adding an aqueous 1N sodium hydroxide solution (15 ml), and the mixture was stirred at 60° C. overnight. After cooling down to 0° C., water was added and the mixture was neutralized with 1N hydrochloric acid. After extracting with ethyl acetate, the organic layer was washed with saturated water and dried with magnesium sulfate. The solvent was distilled off under reduced pressure, and the resulting residue was recrystallized from hexane-ethyl acetate to give 8-(4-(2-butoxyethoxy)phenyl)-1-(2-methyl-2-propen-1-yl)-1,2,3,4-tetrahydro-1-benzoazocine-5-carboxylic acid (0.97 g) as yellow crystals.

Provenance & Evidence