反应详情

温度

-78 °C

To a solution of diisopropylamine (0.7 mL, 0.005 mol) in 9 mL of dry THF was added butyllithium (BuLi) (2.83 mL of 1.62M solution in hexane, 4.6 mmol) at 0° C. The solution was stirred at this temperature for 5 minutes and cooled to −78° C. with a dry ice/isopropanol bath. A solution of 2-methyl-3-[1-[4-(methylsulfonyl)phenyl]-4-(trifluoromethyl)-1H-imidazol-2-yl]pyridine (Example 44) (1.46 g, 3.8 mmol) in 12 mL of dry THF was added over 10 minutes and the reaction mixture was stirred at −78° C. for 1 hour. (Iodomethyl)trimethylsilane (1.23 g, 57 mmol) was added dropwise and the reaction mixture was warmed to room temperature and was stirred overnight. The reaction was quenched with 50 mL of 1 N HCl and the aqueous phase was extracted with ethyl acetate (3×60 mL). The combined organic layers were washed with brine, dried over MgSO4, filtered and concentrated. The crude mixture was purified by chromatography on silica gel (ethyl acetate/hexane, 65:35) to give 1.30 g of 2-methyl-3-[1-[4-[[2-(trimethylsilyl)ethyl]sulfonyl]phenyl]-4-(trifluoromethyl)-1H-imidazol-2-yl]pyridine as a white solid (74%): mp(DSC) 155–157° C. Anal. Calc'd. for C21H24F3N3O2SSi: C, 53.94; H, 5.17; N, 8.99; S, 6.86. Found: C, 53.77; H, 4.94; N, 8.75; S, 6.98.

1. stirringthe reaction mixture was stirred at −78° C. for 1 hour
2. temperaturethe reaction mixture was warmed to room temperature
3. stirringwas stirred overnight
4. customThe reaction was quenched with 50 mL of 1 N HCl
5. extractionthe aqueous phase was extracted with ethyl acetate (3×60 mL)
6. washThe combined organic layers were washed with brine
7. dry with materialdried over MgSO4
8. filtrationfiltered
9. concentrationconcentrated
10. customThe crude mixture was purified by chromatography on silica gel (ethyl acetate/hexane, 65:35)