反应详情

温度

70 °C

A three-neck round bottom flask with magnetic stirrer was charged with crude (2-nitro-phenyl)-acetic acid methyl ester (7.23 g, 37.0 mmol), potassium carbonate (46.1 g, 33.3 mmol), 18-crown-6 (0.650 g), and potassium iodide (0.650 g) under an argon atmosphere. To the flask was added acetonitrile (80 mL) and the mixture heated at 70° C. for one hour. To the reaction was added chloroacetone (3.50 mL, 44.0 mmol) and the reaction stirred at 70° C. under argon for 18-20 hours. The reaction was cooled to room temperature and filtered through a pad of celite. The resulting filtrate was concentrated in vacuo to afford 9.64 g of crude material. Purification via flash chromatography (0-40% ethyl acetate/hexanes eluent) yielded 4.74 g of 2-(2-nitro-phenyl)4-oxo-pentanoic acid methyl ester (51%).

1. temperatureThe reaction was cooled to room temperature
2. filtrationfiltered through a pad of celite
3. concentrationThe resulting filtrate was concentrated in vacuo
4. customto afford 9.64 g of crude material
5. customPurification via flash chromatography (0-40% ethyl acetate/hexanes eluent)