Triethylamine → methyl (E)-[4-[3-(4-fluorophenyl)-3-[4-[(pyridin-2-yl)ethynyl]phenyl]allyloxy]-2-methylphenoxy]acetate

Participants

Reaction Steps

Methyl (Z)-[4-[3-(4-fluorophenyl)-3-(4-iodophenyl)allyloxy]-2-methylphenoxy]acetate (400 mg, 0.75 mmol; example 10) was dissolved in anhydrous tetrahydrofuran (10 mL). Anhydrous triethylamine (20 mL) and a solution of 2-ethynylpyridine (155 mg, 1.50 mmol) in anhydrous tetrahydrofuran (2 mL) were added. The solution was degassed and copper(I) iodide (23 mg, 0.12 mmol) and tetrakis(triphenylphosphine)palladium (70 mg, 0.06 mmol) were added. A mixture was stirred at ambient temperature under nitrogen atmosphere overnight; the resulting suspension was filtered through a paddle of silica gel and silica gel was thoroughly washed with ethyl acetate. The obtained filtrate was evaporated in vacuo and the residue was dissolved in ethyl acetate (50 mL). The solution was washed with water (2×30 mL) and brine (2×30 mL), dried over anhydrous magnesium sulfate and evaporated in vacuo. The residue was purified using column chromatography (silica gel Fluka 60, hexanes/ethyl acetate 90:10) yielding methyl (E)-[4-[3-(4-fluorophenyl)-3-[4-[(pyridin-2-yl)ethynyl]phenyl]allyloxy]-2-methylphenoxy]acetate as orange oil.

Provenance & Evidence