Dimethyl Sulfoxide → 2-Fluoro-5-(3-formylpyridin-2-yloxy)benzoic acid

Participants

Reaction Conditions

Reaction Steps

To 2-chloronicotinaldehyde (381 mg, 2.69 mmol), 2-fluoro-5-hydroxybenzoic acid (300 mg, 1.92 mmol) and cesium carbonate (1.25 g, 3.84 mmol) was added DMSO (2.5 mL). The mixture was heated to 80° C. in a sealed tube for 3 hours. The cooled reaction was diluted with water and extracted with EtOAc. The aqueous layer was acidified with TFA (pH˜3) and extracted with EtOAc. This layer was dried over anhydrous sodium sulfate, filtered and concentrated. The residue was washed with Et2O dried to yield 2-fluoro-5-(3-formylpyridin-2-yloxy)benzoic acid as an off-white solid. MS m/z=262 [M+1]+. Calc'd for C13H8FNO4: 261.21.

Provenance & Evidence