反应详情

To a solution of 4-bromo-2-nitrobenzoic acid (25.3 g, 103 mmol) in DMF (200 mL) at 0° C. were added DBU (79.1 mL, 514.8 mmol) and MeI (32.2 mL, 515 mmol). The reaction mixture was stirred for 15 min at this temperature and for 72 h at r.t. The mixture was poured into water and extracted with EtOAc (2×). The combined organic layers were washed with water (2×), dried (Na2SO4) and the solvent was removed in vacuo. The residue was purified by flash chromatography (silica gel, 7:3 hexanes:EtOAc) to provide the title compound (26.24 g, 98%) as a yellow oil.

1. extractionextracted with EtOAc (2×)
2. washThe combined organic layers were washed with water (2×)
3. dry with materialdried (Na2SO4)
4. customthe solvent was removed in vacuo
5. customThe residue was purified by flash chromatography (silica gel, 7:3 hexanes:EtOAc)