Sodium Hydroxide → 2-Chloro-4-fluoro-5-(pyridin-2-yl)benzoic acid

Participants

Reaction Conditions

Reaction Steps

To a suspension of methyl 2-chloro-4-fluoro-5-(pyridin-2-yl)benzoate (Preparation 40A, 37.6 g, 142 mmol) in methanol (300 mL) was added aqueous sodium hydroxide solution (300 mL, 2 M). The reaction mixture was stirred at 40° C. for 2 hours. The mixture was filtered and the filtrate acidified to pH 6-7 with aqueous HCl solution (300 mL, 2 M). The resulting solid was collected by filtration, washed with water (20 mL) and dried under vacuum over potassium hydroxide at 50° C. for 48 h to afford the title compound as a white solid (36.2 g, 100%).

Provenance & Evidence