反应详情

温度

0 °C

To a solution of 2-(4-bromophenyl)-1H-imidazole (15.0 g, 67.2 mmol) in DMF (150 ml) at 0° C. was added NaH (60% dispersion in mineral oil, 3.90 g, 97.5 mmol). The mixture was stirred at 0° C. for 1 hour and (2-(chloromethoxy)ethyl)trimethylsilane (14.8 mL, 84.0 mmol) was added. The resulting solution was allowed to warm from 0° C. to ambient temperature while stirring over 24 hours. The reaction mixture was diluted with 1:1 brine:H2O (500 mL), extracted with EtOAc (3×200 mL), dried over sodium sulfate, filtered and concentrated to an oil. Purification of the oil by column chromatography, eluting with 10-50% EtOAc/Hexane, afforded 2-(4-bromophenyl)-1-((2-(trimethylsilyl)ethoxy)methyl)-1H-imidazole as a light orange oil, (17.1 g, 70%). LCMS (APCI+) m/z 353, 355 [M+H]+.

1. temperatureto warm from 0° C. to ambient temperature
2. stirringwhile stirring over 24 hours
3. extractionH2O (500 mL), extracted with EtOAc (3×200 mL)
4. dry with materialdried over sodium sulfate
5. filtrationfiltered
6. concentrationconcentrated to an oil
7. customPurification of the oil by column chromatography
8. washeluting with 10-50% EtOAc/Hexane