反应详情

3-Hydroxy-2-methyl-4-pyrone (10 g, 79.4 mmol) was dissolved in methanol (10 mL) and sodium hydroxide (3.49 g, 87.3 mmol) in water (8 mL) was added, followed by ethyl iodide (6.97 mL, 87.3 mmol). The reaction mixture was stirred under reflux overnight. The reaction mixture was then partitioned between water (50 mL) and CH2Cl2 (100 mL). The organic phase was washed with sodium hydroxide (5%, aq.), water, dried (MgSO4) and evaporated to give the title product (8.7 g, 71%) as a solid. The crude product was used in the next step without further purification.

1. temperatureunder reflux overnight
2. customThe reaction mixture was then partitioned between water (50 mL) and CH2Cl2 (100 mL)
3. washThe organic phase was washed with sodium hydroxide (5%, aq.), water
4. dry with materialdried (MgSO4)
5. customevaporated