Sodium Carbonate → Methyl-2-formyl-7-methoxybenzo[b]furan-4-carboxylate

Participants

Reaction Steps

To a well stirred solution of Methyl-2-bromomethyl-7-methoxybenzo[b]furan-4-carboxylate (step 6) (3.1 g, 10.36 mmol) in dimethyl sulfoxide (30.0 mL) was added powdered sodium carbonate (1.64 g, 15.55 mmol) at 90-95° C. and stirred for 2-3 hours. Reaction mixture was cooled to room temperature and diluted with water (300 mL) and extracted with ethyl acetate (3×100 mL). The combined organic layers were washed with water (2×50 mL) and dried over anhydrous sodium sulfate. Removal of solvent gave crude product (2.9 g) as brown viscous oil. Purification by silica gel column using chloroform: ethyl acetate (95:5) as an eluent afforded 2.2 g of pure product.

Provenance & Evidence