反应详情

温度

80 °C

To a mixture of 5-methyl-7-phenylimidazo[5,1-f][1,2,4]triazin-2-amine hydrochloride (0.026 g, 0.10 mmol), 1-iodo-4-nitrobenzene (0.027 g, 0.11 mmol), tris(dibenzylideneacetone)dipalladium (2.7 mg, 0.0030 mmol), (S)-(−)-2,2′-bis(diphenylphosphino)-1,1′-binaphthyl (5.6 mg, 0.0090 mmol) and sodium t-butoxide (0.025 g, 0.23 mmol) was added toluene (1 mL). The solution was heated to 80° C. for two hours. After cooling to room temperature, the solution was filtered, and silica gel (1 g) was added, followed by evaporation of the volatiles under reduced pressure. The pre-adsorbed solids were loaded into a solid loading cartridge and subjected to a gradient elution using ethyl acetate:hexanes (50:50) to ethyl acetate:hexanes (100:0) using a RediSep silica gel cartridge (4 g; ISCO). The appropriate fractions were combined and concentrated under reduced pressure to give 5-methyl-N-(4-nitrophenyl)-7-phenylimidazo[5,1-f][1,2,4]triazin-2-amine (0.0080 g) as a yellow solid. 1H NMR (CDCl3): δ8.86 (s, 1H), 8.78 (s, 1H), 8.48-8.40 (m, 2H), 8.26 (d, J=9.4 Hz, 2H), 7.81 (d, J=9.3 Hz, 2H), 7.61-7.36 (m, 3H), 2.65 (s, 3H). MS m/z 347 (M+1).

1. temperatureAfter cooling to room temperature
2. filtrationthe solution was filtered
3. additionsilica gel (1 g) was added
4. customfollowed by evaporation of the volatiles under reduced pressure
5. washsubjected to a gradient elution
6. concentrationconcentrated under reduced pressure