反应详情

2-Hydroxy-6-methoxybenzaldehyde (3.74 g, 0.025 M), ethyl 5-bromo-2-methylpentanoate (5.58 g, 0.025 M), anhydrous potassium carbonate (3.72 g), sodium iodide (0.11 g) and ethanol (50 ml) were refluxed with stirring for 16 hr. The cooled reaction mixture was filtered and the solid washed well with ethanol. The filtrate was evaporated to dryness and the residue partitioned between ether and water. The organic layer was separated and washed with 2 N sodium hydroxide solution, water, dried (sodium sulphate) and evaporated to give (±)-ethyl 5-(2-formyl-3-methoxyphenoxy)-2-methylpentanoate, 5.3 g, 72%, as an oil.

1. customThe cooled reaction mixture
2. filtrationwas filtered
3. washthe solid washed well with ethanol
4. customThe filtrate was evaporated to dryness
5. customthe residue partitioned between ether and water
6. customThe organic layer was separated
7. washwashed with 2 N sodium hydroxide solution, water
8. dry with materialdried (sodium sulphate)
9. customevaporated