反应详情

4-Diethylamino-2-hydroxybenzaldehyde (300 mg, 1.55 mmol) was placed in a 20 mL reaction vessel, and dissolved in 4.7 mL of dry dichloromethane. To the solution were added N,N-diisopropylethylamine (0.40 mL, 2.3 mmol), 4-dimethylaminopyridine (13 mg, 0.11 mmol), and chloromethyl methyl ether (147 μL, 1.94 mmol). After the reaction mixture was stirred at room temperature overnight, N,N-diisopropylethylamine (0.40 mL, 2.3 mmol), 4-dimethylaminopyridine (13 mg, 0.11 mmol), and chloromethyl methyl ether (147 μL, 1.94 mmol) were added again with additional stirring for 3 h. The resulting mixture was diluted with 100 mL of ethyl acetate and 20 mL of 1N HCl, and extracted. The extract was washed with 1N HCl, saturated NaHCO3 aqueous solution, brine, and dried over MgSO4. After filtration, the filtrate was concentrated in vacuo, and the residue was purified by silica gel column chromatography (hexane/ethyl acetate) to obtain the title compound as a pale yellow oil (324.7 mg, 88%).

1. stirringwith additional stirring for 3 h
2. extractionextracted
3. washThe extract was washed with 1N HCl, saturated NaHCO3 aqueous solution, brine
4. dry with materialdried over MgSO4
5. filtrationAfter filtration
6. concentrationthe filtrate was concentrated in vacuo
7. customthe residue was purified by silica gel column chromatography (hexane/ethyl acetate)