反应详情

温度

90 °C

Combine a mixture of 5-bromo-2-cyano-pyridine (2 g, 10.93 mmol), 2-cyclohexylvinyl boronic acid (2.52 g, 16.39 mmol), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) complex with DCM (446 mg, 0.546 mmol) and 2M aqueous Na2CO3 (18.2 mL, 36.07 mmol) in 1,4-dioxane (110 mL). Purge with nitrogen and heat at 90° C. overnight. Cool the reaction to room temperature and partition between EtOAc and water. Separate the aqueous phase and extract with EtOAc. Dry the combined organic extracts over MgSO4, filter and concentrate in vacuo. Purify by chromatography on silica gel (120 g, pre-packed cartridge) eluting stepwise with hexane/EtOAc (1:0 over 5 min, 49:1 over 5 min and 19:1 over 5 min; 50 mL/min) to obtain the desired intermediate (1.76 g, 76%). MS (APCI+) m/z: 213 (M+H)+.

1. customPurge with nitrogen
2. temperatureCool
3. customthe reaction to room temperature
4. custompartition between EtOAc and water
5. customSeparate the aqueous phase
6. extractionextract with EtOAc
7. dry with materialDry the combined organic extracts over MgSO4
8. filtrationfilter
9. concentrationconcentrate in vacuo
10. customPurify by chromatography on silica gel (120 g, pre-packed cartridge)
11. washeluting stepwise with hexane/EtOAc (1:0 over 5 min, 49:1 over 5 min and 19:1 over 5 min; 50 mL/min)