Trifluoroacetic acid → HCID 68688990, compound

Participants

Reaction Steps

In a 150 mL round bottom flask was combined methyl 3-bromo-2-fluorobenzoate (1.47 g, 6.3 mmol), DMF (10 mL), silver oxide (0.79 g, 6.4 mmol), 2-(tributylstannyl)pyridine (2.40 ml, 7.2 mmol), and dichlorobis(triphenylphosphine)-palladium (II) (0.23 g, 0.33 mmol) and the mixture was stirred at 100° C. to about 72 h. Monitoring the reaction by LC-MS revealed two products, the ester and the hydrolyzed product. The reaction was cooled, filtered through a pad of celite and the celite was washed with EtOAc. The filtrate was concentrated in vacuo and taken up in a small amount of DMF. The solution was purified by reverse-phase preparative HPLC on a Phenomenex Luna column (10 micron, C18, 100 Å, 150×50 mm) eluting at 45 ml/min with an linear gradient of 10% (v/v) to 100% MeCN (0.1% v/v TFA) in water (0.1% TFA) over 10 minutes to give 2-fluoro-3-(pyridine-2-yl)benzoic acid (0.24 g, 0.72 mmol, 23% yield) as a light red-colored TFA salt and methyl 2-fluoro-3-(pyridine-2-yl)benzoate (0.19 g, 0.55 mmol, 17% yield) as a golden syrup-colored TFA salt.

Provenance & Evidence