Pyridine → Ethyl 4-ethoxy-1-(4-fluorophenyl)-2-oxo-1,2-dihydropyridine-3-carboxylate

Participants

Reaction Conditions

Reaction Steps

A mixture of ethyl 4-ethoxy-2-oxo-1,2-dihydropyridine-3-carboxylate (60 g, 0.284 mol), 4-fluoro phenylboronic acid (120 g, 0.853 mol), Cu(AcO)2 (113 g, 0.568 mol) and pyridine (88 g, 1.137 mol) in CH2Cl2 (500 mL) was stirred at ambient temp (˜25° C.) for 4 h open to air. The reaction mixture was filtered and the solids were washed with water. The filtrate was extracted with CH2Cl2 (2×250 mL). The combined organic layers were dried over Na2SO4 and concentrated to afford ethyl 4-ethoxy-1-(4-fluorophenyl)-2-oxo-1,2-dihydropyridine-3-carboxylate. The product was carried forward without further purification. (77 g, 95% yield).

Provenance & Evidence