反应详情

A mixture of 5-bromo-N-hydroxy-3-(methylcarbamoyl)-6-(N-methylmethylsulfonamido)benzofuran-2-carbimidoyl chloride (400 mg, 0.91 mmol), 1-ethoxyprop-1-ene (392 mg, 4.56 mmol) and NaHCO3 (153 mg, 1.82 mmol) in DMF (10 mL) was stirred at room temperature for 16 h. It was concentrated, diluted with water, extracted with EtOAc, the organic layers were washed with brine, dried over Na2SO4, and concentrated. The residue was purified by column chromatography (PE:EA=2:1) to get product 5-bromo-2-(5-ethoxy-4-methyl-4,5-dihydroisoxazol-3-yl)-N-methyl-6-(N-methylmethylsulfonamido)benzofuran-3-carboxamide (370 mg, yield: 83%). MS (M+H)+: 488/490.

1. concentrationIt was concentrated
2. additiondiluted with water
3. extractionextracted with EtOAc
4. washthe organic layers were washed with brine
5. dry with materialdried over Na2SO4
6. concentrationconcentrated
7. customThe residue was purified by column chromatography (PE:EA=2:1)