反应详情

1-Methylethyl 4-{[(6-bromo-2-fluoro-3-pyridinyl)oxy]methyl}-1-piperidinecarboxylate (0.238 g, 68%) was prepared as a white solid from 6-bromo-2-fluoro-3-pyridinol (0.18 g, 0.94 mmol), 1-methylethyl 4-{[(methylsulfonyl)oxy]methyl}-1-piperidinecarboxylate (prepared as in Example 131, Step 4, 0.38 g, 1.22 mmol) and K2CO3 (0.26 g, 1.88 mmol) in DMF (10 mL) in a manner similar to Example 131, Step 5. The crude product was purified by flash chromatography on an ISCO silica gel column using 0 to 35% EtOAc/hexanes. 1H NMR (400 MHz, CDCl3): δ 7.27 (d, 1H, J=8.3 Hz), 7.20-7.10 (m, 1H), 4.91 (septet, 1H, J=6.2 Hz), 4.30-4.10 (m, 2H), 3.85 (d, 2H, J=6.3 Hz), 2.85-2.70 (m, 2H), 2.10-1.95 (m, 1H), 1.90-1.75 (m, 2H), 1.45-1.20 (m, 8H); LRMS (ESI), m/z 375/377 (M+H).

1. customThe crude product was purified by flash chromatography on an ISCO silica gel column