反应详情

To a solution of benzimidazole (500 mg, 4.23 mmol) in 10 mL DMF at 0° C., was added NaH (60%, 169 mg, 4.23 mmol). The mixture was stirred for 20 min, then BOM-Cl (802 μL, 4.65 mmol) was added. The mixture was stirred at rt for 4 h, then was diluted with EtOAc. The organic phase was washed with H2O (3×) and brine, dried (Na2SO4), filtered through 1″ SiO2 (eluting with EtOAc). The crude product was purified by flash chromatography (30 to 100% EtOAc/hexanes gradient) to afford 453 mg of Intermediate 10.1 as a white crystalline solid.

1. stirringThe mixture was stirred at rt for 4 h
2. washThe organic phase was washed with H2O (3×) and brine
3. dry with materialdried (Na2SO4)
4. filtrationfiltered through 1″ SiO2 (eluting with EtOAc)
5. customThe crude product was purified by flash chromatography (30 to 100% EtOAc/hexanes gradient)