反应详情

6-(2-fluoro-4-nitrophenoxy)pyrimidin-4-amine (0.550 g, 2.2 mmol) was dissolved in tetrahydrofuran (10 ml). Then triethylamine (0.61 ml, 4.4 mmol) was added to the mixture with stirring. Then phenyl chloroformate (0.55 ml, 4.4 mmol) was added slowly to the mixture. The mixture was stirred at ambient temperature for 1.5 hours. Then pyrrolidine (1.8 ml, 22 mmol) was added to the mixture, and the mixture was stirred an additional 30 minutes. The mixture was diluted with sat. ammonium chloride and dichloromethane and stirred an additional 10 minutes. The organic layer was collected by extracting with dichloromethane (3×10 ml). Combined organic layer was dried over sodium sulfate, filtered, and concentrated in-vacuo. The crude was purified by chromatography (Amino-Propyl silica gel column) in a gradient of 1-5% MeOH/dichloromethane to give an oil. The oil was recrystallized from dichloromethane/hexanes to give the desired product N-(6-(2-fluoro-4-nitrophenoxy)pyrimidin-4-yl)pyrrolidine-1-carboxamide (0.330 g, 0.95 mmol, 43% yield) as a yellow solid. MS (ESI pos. ion) m/z: 348 (MH+). Calc'd exact mass for C15H14FN5O4: 347. 1NMR (300 MHz, CDCl3): 1.94 (s, 4H), 3.37-3.49 (m, 4H), 5.23 (s, 1H), 7.09-7.21 (m, 1H), 7.29-7.38 (m, 1H), 7.99-8.09 (m, 2H), 8.25 (d, J=0.73 Hz, 1H).

1. stirringThe mixture was stirred at ambient temperature for 1.5 hours
2. stirringthe mixture was stirred an additional 30 minutes
3. stirringstirred an additional 10 minutes
4. customThe organic layer was collected
5. extractionby extracting with dichloromethane (3×10 ml)
6. dry with materialCombined organic layer was dried over sodium sulfate
7. filtrationfiltered
8. concentrationconcentrated in-vacuo
9. customThe crude was purified by chromatography (Amino-Propyl silica gel column) in a gradient of 1-5% MeOH/dichloromethane
10. customto give an oil
11. customThe oil was recrystallized from dichloromethane/hexanes