反应详情

温度

25 °C

2,4-Diamino-6-ethyl-5-hydroxypyrimidine (0.4625 g, 3 mmol) was added to a stirred solution of lithium hydroxide monohydrate (0.4406 g, 10.5 mmol) in DMF (4 mL) and the reaction mixture was stirred at 25° C. for 1 hour. A solution of methyl 3-(2-(3-bromopropoxy)phenyl)propanoate (0.9035 g, 3 mmol) in DMF (1 mL) was added and the reaction mixture was left stirring at 25° C. overnight. DMF was partially removed under reduced pressure to give residue. The residue was diluted with water followed by extraction with dichloromethane. The aqueous layer was neutralized with dil. HCl to give white solid. Recrystallization from acetone afforded the desired diaminopyrimidine as white solid (0.6271 g, 58%, m.p. 155.5-157.5° C.). 1H NMR (400 MHz, DMSO-d6): 1.04 (3H, t, J=7.6 Hz), 2.19 (2H, m), 2.39 (2H, q, J=7.5 Hz), 2.46 (2H, t, J=7.5 Hz), 2.78 (2H, t, J=7.7 Hz), 3.83 (2H, t, J=6.1 Hz), 4.15 (2H, t, J=5.9 Hz), 6.29 (2H, bs), 6.85 (1H, t, J=7.4 Hz), 6.96 (2H, bs), 6.98 (1H, d, J=8.1 Hz), 7.14-7.19 (2H, m).

1. waitthe reaction mixture was left
2. stirringstirring at 25° C. overnight
3. customDMF was partially removed under reduced pressure
4. customto give residue
5. extractionfollowed by extraction with dichloromethane
6. customto give white solid
7. customRecrystallization from acetone