2-Chloroethanol → 2-Fluoro-3-(2-hydroxyethoxy)-5-methoxybenzaldehyde

Participants

Reaction Conditions

Reaction Steps

Under nitrogen atmosphere, a mixture of 2-fluoro-3-hydroxy-5-methoxybenzaldehyde (17.01 g, 100 mmol), 2-chloroethanol (8.72 mL, 130 mmol), sodium iodide (19.49 g, 130 mmol), potassium carbonate (17.97 g, 130 mmol), and N,N-dimethylformamide (85 mL) was stirred at 100° C. for 4.25 hours, after which 2-chloroethanol (4.70 mL, 70 mmol), sodium iodide (10.49 g, 70 mmol), potassium carbonate (9.68 g, 70 mmol), and N,N-dimethylformamide (17 mL) were added thereto, and the resulting mixture was stirred at the same temperature for 4.25 hours. To the mixture, 2-chloroethanol (2.01 mL, 30 mmol), sodium iodide (4.50 g, 30 mmol), and potassium carbonate (4.15 g, 30 mmol) were added, and the resulting mixture was stirred at 100° C. for 7 hours, after which 2-chloroethanol (2.01 mL, 30 mmol) was added thereto, and the resulting mixture was stirred at the same temperature for 2.5 hours. After cooling the mixture, ethyl acetate and water were added to the reaction mixture, and the resulting mixture was extracted. The organic layer was washed with water and concentrated under reduced pressure to obtain a crude product containing the captioned compound (17.70 g) as a red-brown solid.

Provenance & Evidence