Ethyl Acetate → 4-Bromo-2-fluoro-benzoic acid methyl ester

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Reaction Steps

4-Bromo-2-fluorobenzoic acid (5.00 g) was added to ethyl acetate (35 mL) and methanol (35 mL). Trimethylsilyldiazomethane (2M solution in diethyl ether, 12.56 mL) was added slowly and the solution was mixed at room temperature for 30 minutes. The solvent was removed under vacuum, and the crude material was dissolved in ethyl acetate. The solution was extracted with 0.5M sodium hydroxide and dried with brine then anhydrous sodium sulfate. After filtration, the solvent was removed under vacuum to afford crude product of sufficient purity for subsequent use.

Provenance & Evidence