反应详情

A 125 mL Erlenmeyer flask was charged with 4-chloro-5-fluoro-2-(3-methoxybenzyl-oxy)pyrimidine (1.50 g, 5.58 mmol) and EtOH (50 mL). Hydrazine monohydrate (900 μL, 18.5 mmol) was added, and the resulting mixture was allowed to stir at room temperature. After 22 h, the reaction was transferred to a 500 mL Erlenmeyer flask and diluted with water (200 mL), whereupon a white solid began to precipitate from solution. After stirring for 7 h, solid product was collected in a fritted funnel and rinsed with excess water. After drying on the frit, the title compound was obtained (1.23 g, 83%) as a white solid: mp 103-106° C.; 1H NMR (300 MHz, DMSO-d6) δ 8.92 (bs, 1H), 7.86 (d, J=3.6 Hz, 1H), 7.27 (t, J=8.1 Hz, 1H), 6.94-7.01 (m, 2H), 6.87 (dd, J=2.4, 7.9 Hz, 1H), 5.24 (s, 2H), 4.46 (bs, 2H), 3.74 (s, 3H); MS (ESI) m/z 265.2 (M+H)+, 263.2 (M−H)−.

1. customto precipitate from solution
2. stirringAfter stirring for 7 h
3. customsolid product was collected in a fritted funnel
4. washrinsed with excess water
5. customAfter drying on the frit