反应详情

A mixture of 6-(2-fluoro-4-nitrophenoxy)pyrimidin-4-amine (439 mg, 1.2 mmol), BOC2O (261 mg, 1.2 mmol), DMAP (10 mg), and THF (10 mL) was stirred at RT for 1 h then concentrated in vacuo to give the crude product. The product was purified by flash chromatography using 1-2% MeOH in CH2Cl2 as the eluent to give tert-butyl 6-(2-fluoro-4-nitrophenoxy)pyrimidin-4-ylcarbamate as a white solid (110 mg, 26%). 1H NMR (DMSO-d6) δ 10.59 (s, 1H), 8.39 (dd, 1H, J=8.8, 1.1 Hz), 8.32 (dd, 1H, J=10.3, 2.4 Hz), 8.15 (ddd, 1H, J=9.1, 2.5, 1.0 Hz), 7.67 (dd, 1H, J=8.8, 8.8 Hz), 7.45 (s, 1H), 1.44 (s, 9H); MS (ESI−) m/z 349.08 (M−H).

1. concentrationthen concentrated in vacuo
2. customto give the crude product
3. customThe product was purified by flash chromatography