反应详情

7.42 g of 4-methoxybenzylamine was dissolved in 70 mL of methylene chloride, and a solution (10 mL) of 23.2 g of bromoacetyl bromide in methylene chloride was added thereto at −10° C. To the reaction liquid was added dropwise a solution (10 mL) of 8.0 mL of triethylamine in methylene chloride at 0° C., followed by stirring at room temperature for 30 minutes. To the reaction liquid was added water under ice-cooling, followed by extraction with methylene chloride. The organic layer was washed with an aqueous saturated sodium hydrogen carbonate solution, and then dried over anhydrous magnesium sulfate. The solvent was evaporated under reduced pressure, and the obtained residue was purified by silica gel column chromatography (hexane:ethyl acetate=90:10 to 0:100) to obtain a product, which was recrystallized from ethyl acetate to obtain 6.11 g of 2-bromo-N-(4-methoxybenzyl)acetamide.

1. customat −10° C
2. customTo the reaction liquid
3. customTo the reaction liquid
4. temperaturecooling
5. extractionfollowed by extraction with methylene chloride
6. washThe organic layer was washed with an aqueous saturated sodium hydrogen carbonate solution
7. dry with materialdried over anhydrous magnesium sulfate
8. customThe solvent was evaporated under reduced pressure
9. customthe obtained residue was purified by silica gel column chromatography (hexane:ethyl acetate=90:10 to 0:100)
10. customto obtain a product, which
11. customwas recrystallized from ethyl acetate