反应详情

Methyl 5-formylsalicylate (3.3 g, 18 mmol), allyl bromide (1.7 mL, 20 mmol), and potassium carbonate (2.8 g, 20 mmol) were stirred at room temperature in DMF (20 mL) overnight. After concentration, the mixture was diluted with EtOAc and extracted with water (5×), then brine. After drying (MgSO4), solvent was removed to give a yellow solid (4.2 g). 1H-NMR(300 MHz, CDCl3): 9.92 (s, 1H), 8.35 (d, 1H, J=2 Hz), 8.00 (dd, 1H, J=9,2 Hz), 7.09 (d, 1H, J=9 Hz), 6.13-6.01 (m, 1H), 5.58-5.34 (m, 2H), 4.75-4.73 (m, 2H), 3.93 (s, 3H). Anal. Calc'd for C12H12O4 : C, 65.45; H, 5.49; Found: C, 65.10; H, 5.36.

1. concentrationAfter concentration
2. additionthe mixture was diluted with EtOAc
3. extractionextracted with water (5×)
4. dry with materialAfter drying (MgSO4), solvent
5. customwas removed