Sodium Carbonate → 2-[2-Fluoro-4-(thiophene-2-ylmethyl)-phenyl]propionic acid

Participants

Reaction Steps

Compound 20 (0.98 g, 3.8 mmol) and 2-thiopheneboronic acid (0.73 g, 5.7 mmol) were dissolved in tetrahydrofuran (12 mL) and a 2 M-aqueous solution (4.8 mL) of sodium carbonate. To this solution, trans-bromo(N-succinimidyl)bis(triphenylphosphine)palladium(II) [trans-PdBr(N-Succ) (PPh3)2] (30.8 mg, 1.0 mol %) was added and treated in the same manner as in Example 11. The obtained residue was subjected to silica gel column chromatography and elution with an n-hexane/ethyl acetate (20:1) solution followed by conventional hydrolysis with potassium hydroxide to give 0.75 g (76%) of compound (21b) of interest as white solid.

Provenance & Evidence