反应详情

温度

70 °C

A mixture of methyl methylthiomethyl sulfoxide (1.94 g) and finely triturated sodium hydroxide (0.01 g) was stirred at 70° C. for 30 min. 2-Benzyloxy-5-ethoxybenzaldehyde (2.0 g) and methanol (10 mL) were added to the reaction mixture, and the mixture was further heated under reflux for 24 hrs. To the reaction mixture was added ethyl acetate, and the organic layer was washed successively with 1N hydrochloric acid and saturated brine, dried over anhydrous magnesium sulfate, and concentrated. A mixture of the obtained residue and 10% hydrogen chloride-methanol (100 mL) was heated under reflux for 24 hrs. The reaction mixture was concentrated, and then ethyl acetate was added to the residue. The organic layer was washed successively with saturated aqueous sodium hydrogencarbonate and saturated brine, dried over anhydrous magnesium sulfate, and concentrated. The obtained residue was subjected to silica gel column chromatography to give methyl 2-(2-benzyloxy-5-ethoxyphenyl)acetate as a yellow oil (1.60 g, 69%) from a fraction eluted with ethyl acetate-hexane (1:3, v/v).

1. temperaturethe mixture was further heated
2. temperatureunder reflux for 24 hrs
3. washthe organic layer was washed successively with 1N hydrochloric acid and saturated brine
4. dry with materialdried over anhydrous magnesium sulfate
5. concentrationconcentrated
6. additionA mixture of the obtained residue and 10% hydrogen chloride-methanol (100 mL)
7. temperaturewas heated
8. temperatureunder reflux for 24 hrs
9. concentrationThe reaction mixture was concentrated
10. additionethyl acetate was added to the residue
11. washThe organic layer was washed successively with saturated aqueous sodium hydrogencarbonate and saturated brine
12. dry with materialdried over anhydrous magnesium sulfate
13. concentrationconcentrated