反应详情

温度

100 °C

(I2A): A mixture of 7-bromo-2,4-bis(methylthio)imidazo[2,1-f][1,2,4]triazine (6 g, 20.61 mmol), zinc cyanide (1.694 g, 14.42 mmol) and zinc powder (0.270 g, 4.12 mmol) in DMA (150 mL) in a 350 mL round bottom pressure flask was degassed by evacuating with vacuum and back filling with nitrogen three times. bis(tri-t-butylphosphine)palladium (0) (1.053 g, 2.061 mmol) was added and the above process was repeated three times. The reaction mixture was heated at 100° C. for 4 hours. LCMS showed completion of reaction with small amount of de-bromination byproduct and mostly product. The reaction mixture was filtered through a plug of Celite and the filtrate was concentrated in vacuo. The crude product was purified by flash chromatography on silica gel using an automated ISCO system (330 g column, eluting with 0-10% ethyl acetate/dichloromethane). 2,4-bis(methylthio)imidazo[2,1-f][1,2,4]triazine-7-carbonitrile (3.35 g) was obtained as a light yellow solid.

1. customwas degassed
2. customby evacuating with vacuum
3. customcompletion of reaction with small amount of de-bromination byproduct and mostly product
4. filtrationThe reaction mixture was filtered through a plug of Celite
5. concentrationthe filtrate was concentrated in vacuo
6. customThe crude product was purified by flash chromatography on silica gel using
7. washan automated ISCO system (330 g column, eluting with 0-10% ethyl acetate/dichloromethane)