Methyl iodide → 5-Bromo-1-methylpyridin-2(1H)-one

Participants

Reaction Steps

To a solution of 4.38 g of the product from Step A in DMP was added 81 g of cesium carbonate and 30 mL of methyl iodide. The mixture was stirred at ambient temperature overnight, diluted with ethyl acetate, extracted sequentially with two portions of saturated aqueous sodium bicarbonate and brine, dried over sodium sulfate, and concentrated. Purification by HPLC (silica gel, 60% ethyl acetate/hexane) gave the title compound. 1H NMR (500 MHz, CDCl3) δ 7.46 (d, 1H, J=2.7 Hz), 7.38 (dd, 1H, J=2.7, 9.8 Hz), 6.52 (d, 1H, J=9.8 Hz), 3.55 (s, 3H).

Provenance & Evidence