反应详情

To a solution of 5-fluoro-2-(4-fluorobenzyloxy)pyrimidin-4-ylamine (0.10 g, 0.42 mmol) in propionaldehyde (2 mL) was added a catalytic amount of camphorsulfonic acid. The mixture was agitated on an orbital shaker at room temperature for 4 h and then evaporated to dryness. Methanol (2 mL) was added, and the resulting solution was warmed to 60° C. for 1 h. After evaporation, the crude product was purified by reverse phase chromatography to yield the title compound (0.030 g, 24% yield) as a clear, colorless oil: 1H NMR (300 MHz, CDCl3) δ 7.91 (d, J=2.5 Hz, 1H), 7.47-7.41 (m, 2H), 7.09-7.01 (m, 2H), 5.41 (dt, J=9.9 and 6.0 Hz, 1H), 5.30 (s, 2H), 5.2 (bd, J˜10 Hz, 1H), 3.12 (s, 3H), 1.88-1.60 (m, 2H), 0.98 (t, J=7.1 Hz, 3H). HPLC-MS 308 (ES−), 310 (ES+).

1. customevaporated to dryness
2. additionMethanol (2 mL) was added
3. temperaturethe resulting solution was warmed to 60° C. for 1 h
4. customAfter evaporation
5. customthe crude product was purified by reverse phase chromatography