反应详情

Ethyl 2-amino-1-(trans-4-hydroxycyclohexyl)-1H-benzimidazole-5-carboxylate (0.97 g, 0.0032 mol) was dissolved in N,N-dimethylformamide (10 mL, 0.2 mol) at room temperature. 1H-Imidazole (0.50 g, 0.0074 mol) and tert-butyldimethylsilyl chloride (0.53 g, 0.0035 mol) were added and the mixture stirred at room temperature for 1 hour. The reaction mixture was diluted with ethyl acetate and washed with saturated bicarbonate then brine. The organics were collected and dried over sodium sulfate and concentrated. The crude solid was purified by combiflash chromatography using methylene chloride and methanol as eluent. Product fractions were concentrated to give an off white solid (1.099 g). MS (ESI (+)m/z) 418.04 (M+H+)

1. washwashed with saturated bicarbonate
2. customThe organics were collected
3. dry with materialdried over sodium sulfate
4. concentrationconcentrated
5. customThe crude solid was purified by combiflash chromatography
6. concentrationProduct fractions were concentrated