反应详情

温度

70 °C

The reaction mixture of 2-bromo-6-methyl-4-nitrophenyl trifluoromethanesulfonate (65B) (10.1 g, 27.7 mmol), tributylvinyltin (8.18 ml, 27.7 mmol), LiCl (1.4 g, 33.2 mmol), PdCl2dppf (607 mg, 0.83 mmol) in DMF (50 ml) was reacted at 70° C. for 3 h. Then 2N NaOH was added and stirred at 70° C. for 5 min. The reaction mixture was cooled down, washed by sat. NaHCO3, extracted by EtOAc, dry over MgSO4, filtered, concentrated down and purified by silica gel column, eluting by 0-100% EtOAc in Hexanes to give 65C (1.9 g, 30%). 1H-NMR: 400 MHz, (CDCl3) δ: 8.30 (d, J=0.8 Hz, 1H), 8.03 (d, J=1 Hz, 1H), 6.71-6.64 (dd, J=18, 12 Hz, 1H), 5.77-5.74 (d, J=12 Hz, 1H), 5.51-5.46 (d, J=18 Hz, 1H), 2.48 (s, 3H).

1. customwas reacted at 70° C. for 3 h
2. temperatureThe reaction mixture was cooled down
3. washwashed by sat. NaHCO3
4. extractionextracted by EtOAc
5. dry with materialdry over MgSO4
6. filtrationfiltered
7. concentrationconcentrated down
8. custompurified by silica gel column
9. washeluting by 0-100% EtOAc in Hexanes