Dimethylformamide → Methyl 5-bromo-4-cyano-2-hydroxy-3-methylbenzoate

Participants

Reaction Steps

To a solution of 5-bromo-4-cyano-2-hydroxy-3-methylbenzoic acid (7.40 g) in dichloromethane (70.0 mL) were added oxalyl chloride (3.91 g) and DMF (0.20 mL) under ice-cooling, and the mixture was stirred for 3 hr. The reaction mixture was concentrated under reduced pressure, and the residue was diluted with THF. To this mixture was added dropwise a solution of triethylamine (5.66 g) in methanol (50.0 mL) under ice-cooling, and the mixture was stirred for 20 min. The reaction mixture was poured into 1N hydrochloric acid, and the mixture was extracted with ethyl acetate. The organic layer was dried over anhydrous sodium sulfate, and the solvent was evaporated under reduced pressure. The residue was purified by silica gel column chromatography (ethyl acetate/petroleum ether) to give the title compound (4.20 g).

Provenance & Evidence