反应详情

A mixture of N-[3-(5-bromo-1H-benzimidazol-1-yl)phenyl]-N′-(2,2,2-trifluoroethyl)urea (250.0 mg, 0.6050 mmol) (from Example 1, step 4), ethyl 2-[4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl]propanoate (280 mg, 0.91 mmol), [1,1′-bis(diphenylphosphino)ferrocene]-dichloropalladium(II) complex with dichloromethane (1:1) (30 mg, 0.04 mmol, Aldrich, Cat. No. 379670) and sodium carbonate (130 mg, 1.2 mmol) in 1,4-dioxane (5 mL) and a few drops water was heated at 120° C. overnight under nitrogen. After the reaction was cooled to r.t., 1.0 M sodium hydroxide in water (2.4 mL,) was added to the above mixture. The reaction mixture was heated at 100° C. 2 h., then cooled to r.t. The reaction mixture was diluted with ethyl acetate, and extracted with 1N NaOH aqueous solution twice. The combined aqueous phases were acidified to pH˜2 with 6 M HCl aqueous solution, and then extracted with ethyl acetate twice. The combined organic phases (only the extracted portion with acidic aqueous solution) were washed with brine, dried over MgSO4. After filtration, the filtrate was concentrated under reduced pressure to afford the desired product. LCMS (M+H)+: m/z=483.1.

1. temperatureThe reaction mixture was heated at 100° C
2. temperature2 h., then cooled to r.t
3. extractionextracted with 1N NaOH aqueous solution twice
4. extractionextracted with ethyl acetate twice
5. washThe combined organic phases (only the extracted portion with acidic aqueous solution) were washed with brine
6. dry with materialdried over MgSO4
7. filtrationAfter filtration
8. concentrationthe filtrate was concentrated under reduced pressure