反应详情

温度

100 °C

To a stirred solution of 492 mg (1.58 mmol) 2-amino-4-(5-bromo-furan-2-yl)-6-methylsulfanyl-pyrimidine-5-carbonitrile in 15 ml dioxane under argon at room temperature were added 0.59 ml (1.74 mmol) (I-ethoxyvinyl)tributylstannane and 111 mg (0.16 mmol) bis(triphenylphosphine)palladium(II) chloride. The reaction mixture was heated at 100° C. for 18 h, then cooled to room temperature, 2 g of kieselgel added, and the mixture concentrated in vacuo. Flash chromatography (1/2 ethyl acetate/hexane then 1/1 ethyl acetate/hexane then ethyl acetate) followed by trituration in ether afforded 304 mg (64%) 2-amino-4-[5-(1-ethoxy-vinyl)-furan-2-yl]-6-methylsulfanyl-pyrimidine-5-carbonitrile as an off-white crystalline solid. EI-MS m/e (%): 302 (M+, 88), 273 ([M—C2H5]+, 100), 243 (43), 231 (52).

1. temperaturecooled to room temperature
2. addition2 g of kieselgel added
3. concentrationthe mixture concentrated in vacuo