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2,6-Dibromophenol (29.30 g, 116 mmol) and benzyl bromide (33.14 g, 194 mmol) were dissolved in 2-butanone (300 mL). Potassium carbonate (29.47 g, 213 mmol) was added, and the mixture was stirred for 1.5 hr at reflux temperature. The reaction mixture was cooled to room temperature, filtered, and evaporated to dryness. The remaining viscous oil was subjected to silicagel column chromatography, flushing with n-pentane to remove benzyl bromide, then DCM/n-pentane=1:1 to elute the product, yielding the product as a white crystalline solid (39.32 g, 99%). 1H-NMR (CDCl3): δ=7.61 (dd, 2H), 7.54 (d, 2H), 7.41 (m, 3H), 6.90 (t, 1H), 5.04, (s, 2H) ppm.

1. temperatureat reflux temperature
2. filtrationfiltered
3. customevaporated to dryness
4. customflushing with n-pentane
5. customto remove benzyl bromide
6. washDCM/n-pentane=1:1 to elute the product