反应详情

温度

110 °C

A 8-mL vial was charged with 4-chloro-2-(5-chloro-2-thienyl)-5-ethyl-6-methyl-pyrimidine (100 mg, 0.366 mmol, 1.05 eq.), methyl 2-[(4-aminophenyl)methyl]-1H-imidazole-4-carboxylate (81 mg, 0.348 mmol, 1 eq.), AcOH (0.8 ml). To the mixture was added 4N HCl in dioxane (4 drops using 1 ml of a syringe). The resulting mixture was stirred under 110° C. for 2 hrs. After cooling to room temperature, the mixture was added to sodium bicarbonate solution (20 ml). The precipitate was collected by filtration and washed with water then purified by chromatography on silica gel using 1˜1.5% of methanol in dichloromethane as eluent to give the title compound as a foam (79 mg, 48% yield).). MW=467.97. 1H NMR (400 MHz, CDCl3) δ 7.65 (m, 4H), 7.30 (m, 2H), 6.93 (d, J=3.6 Hz, 1H), 6.54 (brs, 1H), 4.18 (s, 2H), 3.90 (s, 3H), 2.64 (q, J=6.8 Hz, 2H), 2.49 (s, 3H), 1.26 (t, J=6.8 Hz, 3H).

1. temperatureAfter cooling to room temperature
2. filtrationThe precipitate was collected by filtration
3. washwashed with water
4. customthen purified by chromatography on silica gel using 1˜1.5% of methanol in dichloromethane as eluent