反应详情

温度

75 °C

4-[2-(tert-Butyl-dimethylsilanyloxy)ethyl]-1-trityl-1H-imidazole (6.5 g, 14.0 mmol) and bromo-(3-fluoro-4-methoxyphenyl)acetic acid methyl ester (5.8 g, 21.0 mmol) are stirred in 60 mL MeCN at room temperature for 2 days. At that point MeOH (50 mL) and Et2NH (50 mL) are then added and the resulting solution heated at 75° C. for 0.5 h. The solution is evaporated and the residue purified via flash column chromatography (EtOAc/DCM 1:9→EtOAc/DCM 1:1) to give {5-[2-(tert-butyldimethylsilanyloxy)ethyl]-imidazol-1-yl}-(3-fluoro-4-methoxyphenyl)acetic acid methyl ester as an oil. MS (ESI) m/z 423.3 (M+H).

1. customThe solution is evaporated
2. customthe residue purified via flash column chromatography (EtOAc/DCM 1:9→EtOAc/DCM 1:1)