Hydrochloric Acid → 3-(2-Methylbut-3-yn-2-yl)benzoic acid

Participants

Reaction Conditions

Reaction Steps

To a solution of methyl 3-(1,1-dimethylprop-2-yn-1-yl)benzoate (2.26 g, 11.2 mmol) in methanol (15 mL)/tetrahydrofuran (10 mL) was added 2N aqueous sodium hydroxide solution (11.2 mL, 22.4 mmol), and the mixture was stirred at 60° C. for 3 hr. The reaction mixture was neutralized with 6N hydrochloric acid (5 mL), 1N hydrochloric acid (50 mL) was added, and the mixture was extracted with ethyl acetate (100 mL, 20 mL). The combined organic layer was washed with saturated brine (10 and dried over anhydrous magnesium sulfate. The insoluble material was filtered off, and the filtrate was concentrated under reduced pressure. The obtained residue was crystallized from ethyl acetate/hexane to give the title compound (1.94 g, 92%) as colorless crystals.

Provenance & Evidence