反应详情

To 3-(4-bromophenyl)-1H-pyrazole (2.0 g, 9.0 mmol) in DMF was added sodium hydride (0.54 g, 13 mmol) (60% in oil) and the reaction was stirred at ambient temperature for 30 minutes. (2-(Chloromethoxy)ethyl)trimethylsilane (4.5 g, 27 mmol) was added and the reaction was stirred overnight. Water was added and the aqueous phase extracted with DCM. The combined organic phases were dried over MgSO4, filtered and concentrated. The crude material was purified by reverse phase chromatography (SP4, 25M, water/CH3CN 60:40 to 0:100, 20 column volumes) to yield 3-(4-bromophenyl)-1-((2-(trimethylsilyl)ethoxy)methyl)-1H-pyrazole (2.4 g, 76% yield) as a clear oil.

1. stirringthe reaction was stirred overnight
2. extractionthe aqueous phase extracted with DCM
3. dry with materialThe combined organic phases were dried over MgSO4
4. filtrationfiltered
5. concentrationconcentrated
6. customThe crude material was purified by reverse phase chromatography (SP4, 25M, water/CH3CN 60:40 to 0:100, 20 column volumes)