反应详情

To a solution of 0.12 g (0.3 mmol) of (E)-methyl 2-(2-((4-((E)-1-(hydroxyimino)propyl)-2,5-dimethylphenoxy)methyl)phenyl)-3-methoxyacrylate obtained in Step 4 and 0.2 g (0.61 mmol) of cesium carbonate in 10 mL of acetonitrile (CH3CN) was added propyl bromide (0.05 mL, 0.55 mmol), followed by stirring at room temperature for 3 hours. After completion of the reaction, the solvent was removed under reduced pressure and the residue thus obtained was stirred in water (10 mL) and extracted twice with 10 mL of dichloromethane. The organic layer was dried over anhydrous magnesium sulfate and concentrated in a vacuum and the concentrate was purified by silica gel chromatography to afford 0.1 g of (E)-methyl 2-(2-((2,5-dimethyl-4-((E)-1-(propoxyimino)propyl)phenoxy)-methyl)phenyl)-3-methoxyacrylate as a white oil (yield: 77%).

1. customAfter completion of the reaction
2. customthe solvent was removed under reduced pressure
3. customthe residue thus obtained
4. extractionextracted twice with 10 mL of dichloromethane
5. dry with materialThe organic layer was dried over anhydrous magnesium sulfate
6. concentrationconcentrated in a vacuum
7. customthe concentrate was purified by silica gel chromatography