反应详情

Under an argon atmosphere, a solution of N-(4-iodophenyl)pyrimidin-2-amine (8.00 g) in anhydrous DMF (50 ml) was added dropwise to a suspension of sodium hydride (1.08 g) in anhydrous DMF (200 ml), and the resulting mixture was stirred at room temperature for 80 minutes. To the reaction solution, 2-iodopropane (4.03 ml) was added, and the resulting mixture was stirred at room temperature for 2 hours. Sodium hydride (1.08 g) was added to the reaction solution and thereafter 2-iodopropane (4.03 ml) was added dropwise thereto, followed by stirring the resulting mixture at room temperature for 6 hours. Water was added to the reaction solution and the resulting mixture was extracted twice with ethyl acetate. Organic layers were washed 4 times with water and once with saturated brine, and dried over anhydrous sodium sulfate. After removing anhydrous sodium sulfate by filtration, the filtrate was concentrated. The residue was purified by column chromatography (silica gel, eluent: cyclohexane-cyclohexane/ethyl acetate=50/1). The obtained solid was recrystallized from hexane to obtain N-(4-iodophenyl)-N-isopropylpyrimidin-2-amine (7.06 g). NMR (H1, CDCl3): δ 1.14(3H, s), 1.16 (3H, s), 5.12-5.19 (1H, m), 6.52 (1H, t, J=4.6 Hz), 6.88-6.92 (2H, m), 7.74-7.77 (2H, m), 8.29 (2H, d, J=4.6 Hz)

1. stirringthe resulting mixture was stirred at room temperature for 2 hours
2. stirringby stirring the resulting mixture at room temperature for 6 hours
3. extractionthe resulting mixture was extracted twice with ethyl acetate
4. washOrganic layers were washed 4 times with water
5. dry with materialonce with saturated brine, and dried over anhydrous sodium sulfate
6. customAfter removing anhydrous sodium sulfate
7. filtrationby filtration
8. concentrationthe filtrate was concentrated
9. customThe residue was purified by column chromatography (silica gel, eluent: cyclohexane-cyclohexane/ethyl acetate=50/1)
10. customThe obtained solid was recrystallized from hexane