反应详情

To a solution of 420 mg (2.25 mmol) 4-chloropyrimidine-5-carboxylic acid ethyl ester (commercially available, CAS RN 41103-17-7) and 440 mg (2.7 mmol) 2,5-dichlorophenol (commercially available, CAS RN 583-78-8) in 2.5 mL toluene were added 688 mg (5.17 mmol) cesium carbonate and 168 mg (0.45 mmol) tetrakis(acetonitrile) copper(I) hexafluorophosphate (commercially available, CAS RN 64443-05-6). The reaction was heated to reflux for 2.5 h. The solvent was evaporated and the crude reaction product extracted with ethyl acetate from an aqueous saturated solution of sodium bicarbonate. The organic layer was dried over magnesium sulfate, filtered and evaporated. The resulting product was purified by silica gel chromatography using a MPLC system (silica gel column, CombiFlash Companion, Isco Inc.) eluting with a gradient of n-heptane:ethyl acetate yielding 620 mg (88%) of the desired compound as a light yellow viscous oil. MS (ESI): m/z=313.1 [M+H]+.

1. temperatureThe reaction was heated
2. temperatureto reflux for 2.5 h
3. customThe solvent was evaporated
4. customthe crude reaction product
5. extractionextracted with ethyl acetate from an aqueous saturated solution of sodium bicarbonate
6. dry with materialThe organic layer was dried over magnesium sulfate
7. filtrationfiltered
8. customevaporated
9. customThe resulting product was purified by silica gel chromatography
10. washeluting with a gradient of n-heptane