Sodium Hydroxide → 2-Fluoro-4-(8,8-dimethl-5-oxo-5,6,7,8-tetrahydro-naphthalen-2yl-ethynyl)-benzoic Acid

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Reaction Conditions

Reaction Steps

A solution of 2-fluoro-4-(8,8-dimethyl-5-oxo-5,6,7,8-tetrahydro-naphthalen-2-ylethynyl)benzoic acid ethyl ester (Compound 9, 0.1 g, 0.274 mmol) in ethanol(4 mL), methanol (2 mL) and tetrahydrofuran (2 mL) was treated with 1 M aqueous sodium hydroxide solution and heated at 70° C. for 1 h. The volatiles were distilled off in vacuo and the residue was diluted with water and dilute hydrochloric acid and extracted with ethyl acetate (×2). The combined organic extract was dried over anhydrous sodium sulfate, filtered and evaporated in vacuo to afford a solid that was recrystallized from hot aqueous acetonitrile to afford the title compound (0.025 g, 27%).

Provenance & Evidence