反应详情

To an ice-cooled solution of 1,3-difluoro-4-nitro-2-vinylbenzene (389 mg, 2.1 mmol) in DMF (8 mL) was added 3-butenylamine hydrochloride (248 mg, 2.31 mmol) and potassium carbonate (0.87 g, 6.3 mmol). The reaction mixture was stirred at RT for 2 h, and then partitioned between water and EtOAc. The aqueous phase was extracted with EtOAc and the combined organic layers were washed with water, followed by brine, then dried (Na2SO4) and concentrated in vacuo. The resulting residue was purified by column chromatography (Si—PCC, eluant 2-4% EtOAc in cyclohexane) affording the title compound as an orange oil (327.6 mg, 66%). LCMS (Method B): RT 4.27 min [M+H]+ 237

1. custompartitioned between water and EtOAc
2. extractionThe aqueous phase was extracted with EtOAc
3. washthe combined organic layers were washed with water
4. dry with materialdried (Na2SO4)
5. concentrationconcentrated in vacuo
6. customThe resulting residue was purified by column chromatography (Si—PCC, eluant 2-4% EtOAc in cyclohexane)