Potassium Carbonate → 4-(4-Bromo-2-fluoro-phenoxy)-6-[1-(3-isopropyl-[1,2,4]oxadiazol-5-yl)-piperidin-4-yloxy]-5-methyl-pyrimidine

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A mixture of 4-chloro-6-[1-(3-isopropyl-[1,2,4]oxadiazol-5-yl)-piperidin-4-yloxy]-5-methyl-pyrimidine (1.51 g, 4.46 mmol), potassium carbonate (1.25 g, 9.03 mmol), and 4-bromo-2-fluorophenol (1.11 g, 5.82 mmol) in 15 mL DMF was heated in microwave for 1 hour at 150° C. The mixture was purified by column chromatography on silica gel with hexane/ethyl acetate (3:1 v/v) to give Compound C40 as an oil (1.05 g, 48%). 1H NMR (CDCl3, 400 MHz) δ 1.20-1.22 (d, 6H), 1.83-1.91 (m, 2H), 1.98-2.05 (m, 2H), 2.11 (s, 3H), 2.77-2.87 (m, 1H), 3.53-3.59 (m, 2H), 3.74-3.80 (m, 2H), 5.31-5.36 (m, 1H), 6.99-7.03 (m, 1H), 7.22-7.29 (m, 2H), 8.13 (s, 1H). Exact mass calculated for C21H23BrFN5O3 491.1, found 492.4 (MH+).

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