Potassium carbonate (535 mg, 3.88 mmol) was added to a solution of tert-butyl 2,4,5-trifluorobenzoate (Preparation 10, 275 mg, 1.29 mmol) and (5,6-dichloropyridin-3-yl)methanol (241 mg, 1.36 mmol) in DMSO (5 mL). The reaction mixture was stirred at RT for 18 hours. After cooling the reaction mixture was quenched with water (25 mL) and extracted with ethyl acetate (2×50 mL). The combined organic layers were washed with water (2×100 mL) and dried over MgSO4, filtered and concentrated in vacuo to give 490 mg of the title compound in a quantitative yield. The crude compound was used without further purification.
