反应详情

温度

68 °C

To a solution of 4.0 g (26.3 mmol) of 2-hydroxyl-4-methoxybenzaldehyde in 30 mL of ethanol was added 1.87 g (7.4 mmol) of iodine, followed by addition of a solution of 6 g (26.3 mmol) of periodic acid in 10 mL of water. The resulting dark yellow solution was heated to 68° C. for two h. After cooling to room temperature, the reaction was added to 300 mL of ethyl acetate. The resulting organic solution was washed with saturated aqueous solution of sodium sulfite, washed with brine and dried over anhydrous magnesium sulfate. After removing the volatiles, the crude products were purified by silica chromatography to afford 1.8 g (49%) of a light yellow solid: 1H NMR(CDCl3/400 MHz,) 12.18(s, 1H), 9.63(s, 1H), 7.53(d, J=8.4 Hz, 1H), 6.56(d, J=8.4 Hz, 1H), 3.99(s, 3H). 13C NMR (CDCl3/400 MHz) 194.2, 165.3, 163.0, 136.3, 116.1, 103.6, 57.2. MS (ESI+) 278.9(M+1, 100).

1. temperatureAfter cooling to room temperature
2. washThe resulting organic solution was washed with saturated aqueous solution of sodium sulfite
3. washwashed with brine
4. dry with materialdried over anhydrous magnesium sulfate
5. customAfter removing the volatiles
6. customthe crude products were purified by silica chromatography