反应详情

A stirred solution of methyl (3,5-dibromo-4-fluorophenyl)carbamate (0.82 g, 2.508 mmol) in DMF (20 mL) was treated with sodium bis(trimethylsilyl)amide (3.01 mL, 3.01 mmol), stirred at room temperature for 30 minutes, then 1-(chloromethyl)-4-methoxybenzene (0.410 mL, 3.01 mmol) was added, stirred at 70° C. for two hours. The reaction mixture was partitioned between NH4Cl solution and EtOAc. The organic layer was washed with NaHCO3 solution (2×), then brine, then dried over MgSO4, filtered and evaporated to dryness to give 1.40 g colorless film, which was purified by column chromatography on silica (120 g silica, gradient from 100% hexanes to 20% EtOAc in hexanes) to give methyl (3,5-dibromo-4-fluorophenyl)(4-methoxybenzyl)carbamate (1.01 g)

1. stirringstirred at 70° C. for two hours
2. customThe reaction mixture was partitioned between NH4Cl solution and EtOAc
3. washThe organic layer was washed with NaHCO3 solution (2×)
4. dry with materialbrine, then dried over MgSO4
5. filtrationfiltered
6. customevaporated to dryness
7. customto give 1.40 g colorless film, which
8. customwas purified by column chromatography on silica (120 g silica, gradient from 100% hexanes to 20% EtOAc in hexanes)