反应详情

温度

140 °C

To a round bottom flask containing Compound 9 (80 mg, 0.268 mmol) in DMF (2 mL) was added potassium carbonate (74.1 mg, 0.536 mmol) and 4-fluoro-nitrobenzene (41.6 mg, 0.295 mmol). The reaction mixture was heated for 20 min at 140° C. After cooling down to rt, the mixture was diluted with water (20 mL) and extracted with EtOAc (20 mL×3). The organic layers were dried, concentrated. The residue was purified on a silica gel column (EtOAc:Hexanes=3:7) to afford Compound 10 as a yellow solid (50 mg, 0.12 mmol, 44% yield). 1H NMR (400 MHz, CDCl3) δ: 8.22 (d, J=9.2 Hz, 2H), 8.10 (br, 1H), 8.00-7.90 (m, 3H), 7.12 (s, 1H), 7.06-6.90 (m, 4H), 6.70 (br, 1H), 1.56 (s, 9H); LRMS for C23H21N3O5+H+, calc'd: 420.2. found: 420.2 (M+H+).

1. temperatureAfter cooling down to rt
2. extractionextracted with EtOAc (20 mL×3)
3. customThe organic layers were dried
4. concentrationconcentrated
5. customThe residue was purified on a silica gel column (EtOAc:Hexanes=3:7)