反应详情

温度

90 °C

A mixture of 4-benzyloxy-2-hydroxy-3-methyl-benzaldehyde (1.57 g, 6.49 mmol), dimethylsulfate (1.04 ml, 10.9 mmol), NaOH (1.02 g, 25.5 mmol), 1,4-dioxane (20 mL) and water (10 mL) was stirred at 90° C. for 6 h. The reaction mixture was cooled to RT, water (100 mL) was added, extracted with EtOAc (150 mL). The extract was washed with brine (100 mL), dried over Na2SO4 and evaporated. The residue was purified on SiO2 (25 g) column, hexane to toluene. Yield 1.20 g (4.68 mmol, 72%), white solid. 1H NMR (300 MHz, DMSO): δ 10.11 (s, 1H), 7.64 (d, J=8.9 Hz, 1H), 7.49-7.32 (m, 5H), 7.05 (d, J=8.9 Hz, 1H), 5.24 (s, 2H), 3.81 (s, 3H), 2.14 (s, 3H).

1. temperatureThe reaction mixture was cooled to RT
2. extractionextracted with EtOAc (150 mL)
3. washThe extract was washed with brine (100 mL)
4. dry with materialdried over Na2SO4
5. customevaporated
6. customThe residue was purified on SiO2 (25 g) column, hexane to toluene